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Finding the Fourth Proportional to 90,681.69, 125,101.89 and 56,631.07

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Solution

The fourth proportional to 90,681.69, 125,101.89 and 56,631.07 is: 78,126.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,681.69 : 125,101.89 = 56,631.07 : x
  2. Step 2: Convert to fraction form
    90,681.69/125,101.89 = 56,631.07/x
  3. Step 3: Cross multiply
    90,681.69x = 125,101.89 × 56,631.07
  4. Step 4: Simplify right side
    90,681.69x = 7,084,653,576.97
  5. Step 5: Solve for x
    x = 7,084,653,576.97/90,681.69
  6. Step 6: Final answer
    x = 78,126.62

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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.