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Finding the Fourth Proportional to 72,251.28, 99,706.74 and 47,100.78

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Solution

The fourth proportional to 72,251.28, 99,706.74 and 47,100.78 is: 64,999.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,251.28 : 99,706.74 = 47,100.78 : x
  2. Step 2: Convert to fraction form
    72,251.28/99,706.74 = 47,100.78/x
  3. Step 3: Cross multiply
    72,251.28x = 99,706.74 × 47,100.78
  4. Step 4: Simplify right side
    72,251.28x = 4,696,265,225.26
  5. Step 5: Solve for x
    x = 4,696,265,225.26/72,251.28
  6. Step 6: Final answer
    x = 64,999.06

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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.