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Finding the Fourth Proportional to 86,414.40, 129,621.60 and 58,420.80

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Solution

The fourth proportional to 86,414.40, 129,621.60 and 58,420.80 is: 87,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,414.40 : 129,621.60 = 58,420.80 : x
  2. Step 2: Convert to fraction form
    86,414.40/129,621.60 = 58,420.80/x
  3. Step 3: Cross multiply
    86,414.40x = 129,621.60 × 58,420.80
  4. Step 4: Simplify right side
    86,414.40x = 7,572,597,569.28
  5. Step 5: Solve for x
    x = 7,572,597,569.28/86,414.40
  6. Step 6: Final answer
    x = 87,631.20

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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.