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Finding the Fourth Proportional to 162,000.20, 242,890.95 and 86,111.30

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Solution

The fourth proportional to 162,000.20, 242,890.95 and 86,111.30 is: 129,108.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,000.20 : 242,890.95 = 86,111.30 : x
  2. Step 2: Convert to fraction form
    162,000.20/242,890.95 = 86,111.30/x
  3. Step 3: Cross multiply
    162,000.20x = 242,890.95 × 86,111.30
  4. Step 4: Simplify right side
    162,000.20x = 20,915,655,462.74
  5. Step 5: Solve for x
    x = 20,915,655,462.74/162,000.20
  6. Step 6: Final answer
    x = 129,108.82

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1.5x scale

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.