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Finding the Fourth Proportional to 128,077.47, 176,746.25 and 74,375.69

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Solution

The fourth proportional to 128,077.47, 176,746.25 and 74,375.69 is: 102,638.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,077.47 : 176,746.25 = 74,375.69 : x
  2. Step 2: Convert to fraction form
    128,077.47/176,746.25 = 74,375.69/x
  3. Step 3: Cross multiply
    128,077.47x = 176,746.25 × 74,375.69
  4. Step 4: Simplify right side
    128,077.47x = 13,145,623,600.87
  5. Step 5: Solve for x
    x = 13,145,623,600.87/128,077.47
  6. Step 6: Final answer
    x = 102,638.06

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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.