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Finding the Fourth Proportional to 86,432.75, 129,649.13 and 28,064.75

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Solution

The fourth proportional to 86,432.75, 129,649.13 and 28,064.75 is: 42,097.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,432.75 : 129,649.13 = 28,064.75 : x
  2. Step 2: Convert to fraction form
    86,432.75/129,649.13 = 28,064.75/x
  3. Step 3: Cross multiply
    86,432.75x = 129,649.13 × 28,064.75
  4. Step 4: Simplify right side
    86,432.75x = 3,638,570,421.17
  5. Step 5: Solve for x
    x = 3,638,570,421.17/86,432.75
  6. Step 6: Final answer
    x = 42,097.13

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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.