Home / 98,856.78-136,432.17-56,421.72

Finding the Fourth Proportional to 98,856.78, 136,432.17 and 56,421.72

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Solution

The fourth proportional to 98,856.78, 136,432.17 and 56,421.72 is: 77,867.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,856.78 : 136,432.17 = 56,421.72 : x
  2. Step 2: Convert to fraction form
    98,856.78/136,432.17 = 56,421.72/x
  3. Step 3: Cross multiply
    98,856.78x = 136,432.17 × 56,421.72
  4. Step 4: Simplify right side
    98,856.78x = 7,697,737,694.73
  5. Step 5: Solve for x
    x = 7,697,737,694.73/98,856.78
  6. Step 6: Final answer
    x = 77,867.57

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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.