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Finding the Fourth Proportional to 78,930.17, 108,931.14 and 43,125.56

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Solution

The fourth proportional to 78,930.17, 108,931.14 and 43,125.56 is: 59,517.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930.17 : 108,931.14 = 43,125.56 : x
  2. Step 2: Convert to fraction form
    78,930.17/108,931.14 = 43,125.56/x
  3. Step 3: Cross multiply
    78,930.17x = 108,931.14 × 43,125.56
  4. Step 4: Simplify right side
    78,930.17x = 4,697,716,413.94
  5. Step 5: Solve for x
    x = 4,697,716,413.94/78,930.17
  6. Step 6: Final answer
    x = 59,517.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.