Home / 91,036.80-136,574.40-38,419.20

Finding the Fourth Proportional to 91,036.80, 136,574.40 and 38,419.20

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Solution

The fourth proportional to 91,036.80, 136,574.40 and 38,419.20 is: 57,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,036.80 : 136,574.40 = 38,419.20 : x
  2. Step 2: Convert to fraction form
    91,036.80/136,574.40 = 38,419.20/x
  3. Step 3: Cross multiply
    91,036.80x = 136,574.40 × 38,419.20
  4. Step 4: Simplify right side
    91,036.80x = 5,247,079,188.48
  5. Step 5: Solve for x
    x = 5,247,079,188.48/91,036.80
  6. Step 6: Final answer
    x = 57,636.90

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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.