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Finding the Fourth Proportional to 88,720.76, 122,434.92 and 56,889.78

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Solution

The fourth proportional to 88,720.76, 122,434.92 and 56,889.78 is: 78,508.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,720.76 : 122,434.92 = 56,889.78 : x
  2. Step 2: Convert to fraction form
    88,720.76/122,434.92 = 56,889.78/x
  3. Step 3: Cross multiply
    88,720.76x = 122,434.92 × 56,889.78
  4. Step 4: Simplify right side
    88,720.76x = 6,965,295,663.12
  5. Step 5: Solve for x
    x = 6,965,295,663.12/88,720.76
  6. Step 6: Final answer
    x = 78,508.07

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1.5x scale

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.