Home / 86,454.48-129,681.72-66,761.76

Finding the Fourth Proportional to 86,454.48, 129,681.72 and 66,761.76

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Solution

The fourth proportional to 86,454.48, 129,681.72 and 66,761.76 is: 100,142.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,454.48 : 129,681.72 = 66,761.76 : x
  2. Step 2: Convert to fraction form
    86,454.48/129,681.72 = 66,761.76/x
  3. Step 3: Cross multiply
    86,454.48x = 129,681.72 × 66,761.76
  4. Step 4: Simplify right side
    86,454.48x = 8,657,779,867.03
  5. Step 5: Solve for x
    x = 8,657,779,867.03/86,454.48
  6. Step 6: Final answer
    x = 100,142.64

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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.