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Finding the Fourth Proportional to 142,575.52, 196,751.28 and 78,909.52

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Solution

The fourth proportional to 142,575.52, 196,751.28 and 78,909.52 is: 108,893.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,575.52 : 196,751.28 = 78,909.52 : x
  2. Step 2: Convert to fraction form
    142,575.52/196,751.28 = 78,909.52/x
  3. Step 3: Cross multiply
    142,575.52x = 196,751.28 × 78,909.52
  4. Step 4: Simplify right side
    142,575.52x = 15,525,549,064.19
  5. Step 5: Solve for x
    x = 15,525,549,064.19/142,575.52
  6. Step 6: Final answer
    x = 108,893.51

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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.