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Finding the Fourth Proportional to 128,174.39, 176,868.72 and 74,458.65

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Solution

The fourth proportional to 128,174.39, 176,868.72 and 74,458.65 is: 102,746.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,174.39 : 176,868.72 = 74,458.65 : x
  2. Step 2: Convert to fraction form
    128,174.39/176,868.72 = 74,458.65/x
  3. Step 3: Cross multiply
    128,174.39x = 176,868.72 × 74,458.65
  4. Step 4: Simplify right side
    128,174.39x = 13,169,406,118.43
  5. Step 5: Solve for x
    x = 13,169,406,118.43/128,174.39
  6. Step 6: Final answer
    x = 102,746.01

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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.