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Finding the Fourth Proportional to 72,921.60, 109,436.40 and 37,843.20

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Solution

The fourth proportional to 72,921.60, 109,436.40 and 37,843.20 is: 56,792.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,921.60 : 109,436.40 = 37,843.20 : x
  2. Step 2: Convert to fraction form
    72,921.60/109,436.40 = 37,843.20/x
  3. Step 3: Cross multiply
    72,921.60x = 109,436.40 × 37,843.20
  4. Step 4: Simplify right side
    72,921.60x = 4,141,423,572.48
  5. Step 5: Solve for x
    x = 4,141,423,572.48/72,921.60
  6. Step 6: Final answer
    x = 56,792.82

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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.