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Finding the Fourth Proportional to 128,042.47, 176,697.60 and 74,332.48

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Solution

The fourth proportional to 128,042.47, 176,697.60 and 74,332.48 is: 102,578.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.47 : 176,697.60 = 74,332.48 : x
  2. Step 2: Convert to fraction form
    128,042.47/176,697.60 = 74,332.48/x
  3. Step 3: Cross multiply
    128,042.47x = 176,697.60 × 74,332.48
  4. Step 4: Simplify right side
    128,042.47x = 13,134,370,818.05
  5. Step 5: Solve for x
    x = 13,134,370,818.05/128,042.47
  6. Step 6: Final answer
    x = 102,578.24

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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.