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Finding the Fourth Proportional to 72,342.40, 108,643.20 and 52,643.20

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Solution

The fourth proportional to 72,342.40, 108,643.20 and 52,643.20 is: 79,059.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,342.40 : 108,643.20 = 52,643.20 : x
  2. Step 2: Convert to fraction form
    72,342.40/108,643.20 = 52,643.20/x
  3. Step 3: Cross multiply
    72,342.40x = 108,643.20 × 52,643.20
  4. Step 4: Simplify right side
    72,342.40x = 5,719,325,706.24
  5. Step 5: Solve for x
    x = 5,719,325,706.24/72,342.40
  6. Step 6: Final answer
    x = 79,059.11

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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.