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Finding the Fourth Proportional to 78,659.32, 108,455.85 and 64,266.10

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Solution

The fourth proportional to 78,659.32, 108,455.85 and 64,266.10 is: 88,610.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,659.32 : 108,455.85 = 64,266.10 : x
  2. Step 2: Convert to fraction form
    78,659.32/108,455.85 = 64,266.10/x
  3. Step 3: Cross multiply
    78,659.32x = 108,455.85 × 64,266.10
  4. Step 4: Simplify right side
    78,659.32x = 6,970,034,501.69
  5. Step 5: Solve for x
    x = 6,970,034,501.69/78,659.32
  6. Step 6: Final answer
    x = 88,610.41

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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.