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Finding the Fourth Proportional to 78,251.68, 108,009.48 and 64,138.24

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Solution

The fourth proportional to 78,251.68, 108,009.48 and 64,138.24 is: 88,528.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,251.68 : 108,009.48 = 64,138.24 : x
  2. Step 2: Convert to fraction form
    78,251.68/108,009.48 = 64,138.24/x
  3. Step 3: Cross multiply
    78,251.68x = 108,009.48 × 64,138.24
  4. Step 4: Simplify right side
    78,251.68x = 6,927,537,950.52
  5. Step 5: Solve for x
    x = 6,927,537,950.52/78,251.68
  6. Step 6: Final answer
    x = 88,528.94

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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.