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Finding the Fourth Proportional to 86,319.60, 129,479.67 and 23,990.10

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Solution

The fourth proportional to 86,319.60, 129,479.67 and 23,990.10 is: 35,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,319.60 : 129,479.67 = 23,990.10 : x
  2. Step 2: Convert to fraction form
    86,319.60/129,479.67 = 23,990.10/x
  3. Step 3: Cross multiply
    86,319.60x = 129,479.67 × 23,990.10
  4. Step 4: Simplify right side
    86,319.60x = 3,106,230,231.27
  5. Step 5: Solve for x
    x = 3,106,230,231.27/86,319.60
  6. Step 6: Final answer
    x = 35,985.23

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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.