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Finding the Fourth Proportional to 72,470.48, 99,873.84 and 56,529.68

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Solution

The fourth proportional to 72,470.48, 99,873.84 and 56,529.68 is: 77,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,470.48 : 99,873.84 = 56,529.68 : x
  2. Step 2: Convert to fraction form
    72,470.48/99,873.84 = 56,529.68/x
  3. Step 3: Cross multiply
    72,470.48x = 99,873.84 × 56,529.68
  4. Step 4: Simplify right side
    72,470.48x = 5,645,836,215.57
  5. Step 5: Solve for x
    x = 5,645,836,215.57/72,470.48
  6. Step 6: Final answer
    x = 77,905.32

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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.