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Finding the Fourth Proportional to 90,291.81, 124,540.81 and 61,948.29

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Solution

The fourth proportional to 90,291.81, 124,540.81 and 61,948.29 is: 85,446.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,291.81 : 124,540.81 = 61,948.29 : x
  2. Step 2: Convert to fraction form
    90,291.81/124,540.81 = 61,948.29/x
  3. Step 3: Cross multiply
    90,291.81x = 124,540.81 × 61,948.29
  4. Step 4: Simplify right side
    90,291.81x = 7,715,090,214.71
  5. Step 5: Solve for x
    x = 7,715,090,214.71/90,291.81
  6. Step 6: Final answer
    x = 85,446.18

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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.