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Finding the Fourth Proportional to 86,948.60, 130,422.90 and 40,292.60

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Solution

The fourth proportional to 86,948.60, 130,422.90 and 40,292.60 is: 60,438.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,948.60 : 130,422.90 = 40,292.60 : x
  2. Step 2: Convert to fraction form
    86,948.60/130,422.90 = 40,292.60/x
  3. Step 3: Cross multiply
    86,948.60x = 130,422.90 × 40,292.60
  4. Step 4: Simplify right side
    86,948.60x = 5,255,077,740.54
  5. Step 5: Solve for x
    x = 5,255,077,740.54/86,948.60
  6. Step 6: Final answer
    x = 60,438.90

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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.