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Finding the Fourth Proportional to 162,006.70, 242,900.70 and 86,117.80

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Solution

The fourth proportional to 162,006.70, 242,900.70 and 86,117.80 is: 129,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,006.70 : 242,900.70 = 86,117.80 : x
  2. Step 2: Convert to fraction form
    162,006.70/242,900.70 = 86,117.80/x
  3. Step 3: Cross multiply
    162,006.70x = 242,900.70 × 86,117.80
  4. Step 4: Simplify right side
    162,006.70x = 20,918,073,902.46
  5. Step 5: Solve for x
    x = 20,918,073,902.46/162,006.70
  6. Step 6: Final answer
    x = 129,118.57

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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.