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Finding the Fourth Proportional to 86,861.60, 130,191.60 and 40,119.20

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Solution

The fourth proportional to 86,861.60, 130,191.60 and 40,119.20 is: 60,132.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,861.60 : 130,191.60 = 40,119.20 : x
  2. Step 2: Convert to fraction form
    86,861.60/130,191.60 = 40,119.20/x
  3. Step 3: Cross multiply
    86,861.60x = 130,191.60 × 40,119.20
  4. Step 4: Simplify right side
    86,861.60x = 5,223,182,838.72
  5. Step 5: Solve for x
    x = 5,223,182,838.72/86,861.60
  6. Step 6: Final answer
    x = 60,132.24

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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.