Home / 100,337.45-138,362.31-70,111.74

Finding the Fourth Proportional to 100,337.45, 138,362.31 and 70,111.74

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Solution

The fourth proportional to 100,337.45, 138,362.31 and 70,111.74 is: 96,681.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,337.45 : 138,362.31 = 70,111.74 : x
  2. Step 2: Convert to fraction form
    100,337.45/138,362.31 = 70,111.74/x
  3. Step 3: Cross multiply
    100,337.45x = 138,362.31 × 70,111.74
  4. Step 4: Simplify right side
    100,337.45x = 9,700,822,304.52
  5. Step 5: Solve for x
    x = 9,700,822,304.52/100,337.45
  6. Step 6: Final answer
    x = 96,681.97

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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.