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Finding the Fourth Proportional to 212,625,728.40, 318,922,003.80 and 83,208,205.20

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Solution

The fourth proportional to 212,625,728.40, 318,922,003.80 and 83,208,205.20 is: 124,805,816.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,625,728.40 : 318,922,003.80 = 83,208,205.20 : x
  2. Step 2: Convert to fraction form
    212,625,728.40/318,922,003.80 = 83,208,205.20/x
  3. Step 3: Cross multiply
    212,625,728.40x = 318,922,003.80 × 83,208,205.20
  4. Step 4: Simplify right side
    212,625,728.40x = 26,536,927,534,985,580
  5. Step 5: Solve for x
    x = 26,536,927,534,985,580/212,625,728.40
  6. Step 6: Final answer
    x = 124,805,816.00

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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.