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Finding the Fourth Proportional to 124,225.64, 171,545.16 and 78,918.20

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Solution

The fourth proportional to 124,225.64, 171,545.16 and 78,918.20 is: 108,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,225.64 : 171,545.16 = 78,918.20 : x
  2. Step 2: Convert to fraction form
    124,225.64/171,545.16 = 78,918.20/x
  3. Step 3: Cross multiply
    124,225.64x = 171,545.16 × 78,918.20
  4. Step 4: Simplify right side
    124,225.64x = 13,538,035,245.91
  5. Step 5: Solve for x
    x = 13,538,035,245.91/124,225.64
  6. Step 6: Final answer
    x = 108,979.40

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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.