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Finding the Fourth Proportional to 108,397.92, 149,386.50 and 78,130.92

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Solution

The fourth proportional to 108,397.92, 149,386.50 and 78,130.92 is: 107,674.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,397.92 : 149,386.50 = 78,130.92 : x
  2. Step 2: Convert to fraction form
    108,397.92/149,386.50 = 78,130.92/x
  3. Step 3: Cross multiply
    108,397.92x = 149,386.50 × 78,130.92
  4. Step 4: Simplify right side
    108,397.92x = 11,671,704,680.58
  5. Step 5: Solve for x
    x = 11,671,704,680.58/108,397.92
  6. Step 6: Final answer
    x = 107,674.62

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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.