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Finding the Fourth Proportional to 72,423.60, 99,969.12 and 45,611.04

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Solution

The fourth proportional to 72,423.60, 99,969.12 and 45,611.04 is: 62,958.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,423.60 : 99,969.12 = 45,611.04 : x
  2. Step 2: Convert to fraction form
    72,423.60/99,969.12 = 45,611.04/x
  3. Step 3: Cross multiply
    72,423.60x = 99,969.12 × 45,611.04
  4. Step 4: Simplify right side
    72,423.60x = 4,559,695,531.08
  5. Step 5: Solve for x
    x = 4,559,695,531.08/72,423.60
  6. Step 6: Final answer
    x = 62,958.70

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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.