Home / 100,521.43-138,730.64-57,504.89

Finding the Fourth Proportional to 100,521.43, 138,730.64 and 57,504.89

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Solution

The fourth proportional to 100,521.43, 138,730.64 and 57,504.89 is: 79,363.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,521.43 : 138,730.64 = 57,504.89 : x
  2. Step 2: Convert to fraction form
    100,521.43/138,730.64 = 57,504.89/x
  3. Step 3: Cross multiply
    100,521.43x = 138,730.64 × 57,504.89
  4. Step 4: Simplify right side
    100,521.43x = 7,977,690,252.13
  5. Step 5: Solve for x
    x = 7,977,690,252.13/100,521.43
  6. Step 6: Final answer
    x = 79,363.08

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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.