Home / 103,276.56-142,565.76-87,443.76

Finding the Fourth Proportional to 103,276.56, 142,565.76 and 87,443.76

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Solution

The fourth proportional to 103,276.56, 142,565.76 and 87,443.76 is: 120,709.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,276.56 : 142,565.76 = 87,443.76 : x
  2. Step 2: Convert to fraction form
    103,276.56/142,565.76 = 87,443.76/x
  3. Step 3: Cross multiply
    103,276.56x = 142,565.76 × 87,443.76
  4. Step 4: Simplify right side
    103,276.56x = 12,466,486,101.66
  5. Step 5: Solve for x
    x = 12,466,486,101.66/103,276.56
  6. Step 6: Final answer
    x = 120,709.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.