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Finding the Fourth Proportional to 212,954,413.80, 319,431,620.70 and 109,642,283.40

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Solution

The fourth proportional to 212,954,413.80, 319,431,620.70 and 109,642,283.40 is: 164,463,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,954,413.80 : 319,431,620.70 = 109,642,283.40 : x
  2. Step 2: Convert to fraction form
    212,954,413.80/319,431,620.70 = 109,642,283.40/x
  3. Step 3: Cross multiply
    212,954,413.80x = 319,431,620.70 × 109,642,283.40
  4. Step 4: Simplify right side
    212,954,413.80x = 35,023,212,283,710,708
  5. Step 5: Solve for x
    x = 35,023,212,283,710,708/212,954,413.80
  6. Step 6: Final answer
    x = 164,463,425.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.