Home / 91,083.28-136,637.70-31,905.40

Finding the Fourth Proportional to 91,083.28, 136,637.70 and 31,905.40

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Solution

The fourth proportional to 91,083.28, 136,637.70 and 31,905.40 is: 47,862.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,083.28 : 136,637.70 = 31,905.40 : x
  2. Step 2: Convert to fraction form
    91,083.28/136,637.70 = 31,905.40/x
  3. Step 3: Cross multiply
    91,083.28x = 136,637.70 × 31,905.40
  4. Step 4: Simplify right side
    91,083.28x = 4,359,480,473.58
  5. Step 5: Solve for x
    x = 4,359,480,473.58/91,083.28
  6. Step 6: Final answer
    x = 47,862.58

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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.