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Finding the Fourth Proportional to 70,278.40, 96,981.12 and 38,447.92

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Solution

The fourth proportional to 70,278.40, 96,981.12 and 38,447.92 is: 53,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,278.40 : 96,981.12 = 38,447.92 : x
  2. Step 2: Convert to fraction form
    70,278.40/96,981.12 = 38,447.92/x
  3. Step 3: Cross multiply
    70,278.40x = 96,981.12 × 38,447.92
  4. Step 4: Simplify right side
    70,278.40x = 3,728,722,343.27
  5. Step 5: Solve for x
    x = 3,728,722,343.27/70,278.40
  6. Step 6: Final answer
    x = 53,056.45

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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.