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Finding the Fourth Proportional to 90,687, 136,038.34 and 25,023

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Solution

The fourth proportional to 90,687, 136,038.34 and 25,023 is: 37,536.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,687 : 136,038.34 = 25,023 : x
  2. Step 2: Convert to fraction form
    90,687/136,038.34 = 25,023/x
  3. Step 3: Cross multiply
    90,687x = 136,038.34 × 25,023
  4. Step 4: Simplify right side
    90,687x = 3,404,087,381.82
  5. Step 5: Solve for x
    x = 3,404,087,381.82/90,687
  6. Step 6: Final answer
    x = 37,536.66

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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.