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Finding the Fourth Proportional to 86,697.85, 130,020.85 and 45,122.17

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Solution

The fourth proportional to 86,697.85, 130,020.85 and 45,122.17 is: 67,669.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,697.85 : 130,020.85 = 45,122.17 : x
  2. Step 2: Convert to fraction form
    86,697.85/130,020.85 = 45,122.17/x
  3. Step 3: Cross multiply
    86,697.85x = 130,020.85 × 45,122.17
  4. Step 4: Simplify right side
    86,697.85x = 5,866,822,897.24
  5. Step 5: Solve for x
    x = 5,866,822,897.24/86,697.85
  6. Step 6: Final answer
    x = 67,669.76

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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.