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Finding the Fourth Proportional to 375,435.71, 563,148.80 and 91,128.47

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Solution

The fourth proportional to 375,435.71, 563,148.80 and 91,128.47 is: 136,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,435.71 : 563,148.80 = 91,128.47 : x
  2. Step 2: Convert to fraction form
    375,435.71/563,148.80 = 91,128.47/x
  3. Step 3: Cross multiply
    375,435.71x = 563,148.80 × 91,128.47
  4. Step 4: Simplify right side
    375,435.71x = 51,318,888,070.69
  5. Step 5: Solve for x
    x = 51,318,888,070.69/375,435.71
  6. Step 6: Final answer
    x = 136,691.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.