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Finding the Fourth Proportional to 108,063.26, 148,948.79 and 72,240.20

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Solution

The fourth proportional to 108,063.26, 148,948.79 and 72,240.20 is: 99,572.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,063.26 : 148,948.79 = 72,240.20 : x
  2. Step 2: Convert to fraction form
    108,063.26/148,948.79 = 72,240.20/x
  3. Step 3: Cross multiply
    108,063.26x = 148,948.79 × 72,240.20
  4. Step 4: Simplify right side
    108,063.26x = 10,760,090,379.36
  5. Step 5: Solve for x
    x = 10,760,090,379.36/108,063.26
  6. Step 6: Final answer
    x = 99,572.14

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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.