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Finding the Fourth Proportional to 120,000.86, 165,579.54 and 77,534.79

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Solution

The fourth proportional to 120,000.86, 165,579.54 and 77,534.79 is: 106,984.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,000.86 : 165,579.54 = 77,534.79 : x
  2. Step 2: Convert to fraction form
    120,000.86/165,579.54 = 77,534.79/x
  3. Step 3: Cross multiply
    120,000.86x = 165,579.54 × 77,534.79
  4. Step 4: Simplify right side
    120,000.86x = 12,838,174,862.20
  5. Step 5: Solve for x
    x = 12,838,174,862.20/120,000.86
  6. Step 6: Final answer
    x = 106,984.02

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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.