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Finding the Fourth Proportional to 86,866.60, 130,199.10 and 40,124.20

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Solution

The fourth proportional to 86,866.60, 130,199.10 and 40,124.20 is: 60,139.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,866.60 : 130,199.10 = 40,124.20 : x
  2. Step 2: Convert to fraction form
    86,866.60/130,199.10 = 40,124.20/x
  3. Step 3: Cross multiply
    86,866.60x = 130,199.10 × 40,124.20
  4. Step 4: Simplify right side
    86,866.60x = 5,224,134,728.22
  5. Step 5: Solve for x
    x = 5,224,134,728.22/86,866.60
  6. Step 6: Final answer
    x = 60,139.74

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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.