Home / 86,219.28-129,156.12-39,407.76

Finding the Fourth Proportional to 86,219.28, 129,156.12 and 39,407.76

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Solution

The fourth proportional to 86,219.28, 129,156.12 and 39,407.76 is: 59,032.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,219.28 : 129,156.12 = 39,407.76 : x
  2. Step 2: Convert to fraction form
    86,219.28/129,156.12 = 39,407.76/x
  3. Step 3: Cross multiply
    86,219.28x = 129,156.12 × 39,407.76
  4. Step 4: Simplify right side
    86,219.28x = 5,089,753,379.49
  5. Step 5: Solve for x
    x = 5,089,753,379.49/86,219.28
  6. Step 6: Final answer
    x = 59,032.66

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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.