Home / 92,289.12-138,543.36-77,679.84

Finding the Fourth Proportional to 92,289.12, 138,543.36 and 77,679.84

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Solution

The fourth proportional to 92,289.12, 138,543.36 and 77,679.84 is: 116,612.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,289.12 : 138,543.36 = 77,679.84 : x
  2. Step 2: Convert to fraction form
    92,289.12/138,543.36 = 77,679.84/x
  3. Step 3: Cross multiply
    92,289.12x = 138,543.36 × 77,679.84
  4. Step 4: Simplify right side
    92,289.12x = 10,762,026,037.86
  5. Step 5: Solve for x
    x = 10,762,026,037.86/92,289.12
  6. Step 6: Final answer
    x = 116,612.08

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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.