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Finding the Fourth Proportional to 72,057.60, 107,943.12 and 56,401.92

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Solution

The fourth proportional to 72,057.60, 107,943.12 and 56,401.92 is: 84,490.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,057.60 : 107,943.12 = 56,401.92 : x
  2. Step 2: Convert to fraction form
    72,057.60/107,943.12 = 56,401.92/x
  3. Step 3: Cross multiply
    72,057.60x = 107,943.12 × 56,401.92
  4. Step 4: Simplify right side
    72,057.60x = 6,088,199,218.79
  5. Step 5: Solve for x
    x = 6,088,199,218.79/72,057.60
  6. Step 6: Final answer
    x = 84,490.73

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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.