Home / 268,480.17-402,720.09-78,942.11

Finding the Fourth Proportional to 268,480.17, 402,720.09 and 78,942.11

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Solution

The fourth proportional to 268,480.17, 402,720.09 and 78,942.11 is: 118,413.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,480.17 : 402,720.09 = 78,942.11 : x
  2. Step 2: Convert to fraction form
    268,480.17/402,720.09 = 78,942.11/x
  3. Step 3: Cross multiply
    268,480.17x = 402,720.09 × 78,942.11
  4. Step 4: Simplify right side
    268,480.17x = 31,791,573,643.99
  5. Step 5: Solve for x
    x = 31,791,573,643.99/268,480.17
  6. Step 6: Final answer
    x = 118,413.12

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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.