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Finding the Fourth Proportional to 78,891.40, 118,337.10 and 47,787.40

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Solution

The fourth proportional to 78,891.40, 118,337.10 and 47,787.40 is: 71,681.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,891.40 : 118,337.10 = 47,787.40 : x
  2. Step 2: Convert to fraction form
    78,891.40/118,337.10 = 47,787.40/x
  3. Step 3: Cross multiply
    78,891.40x = 118,337.10 × 47,787.40
  4. Step 4: Simplify right side
    78,891.40x = 5,655,022,332.54
  5. Step 5: Solve for x
    x = 5,655,022,332.54/78,891.40
  6. Step 6: Final answer
    x = 71,681.10

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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.