Home / 91,048.80-136,592.40-38,431.20

Finding the Fourth Proportional to 91,048.80, 136,592.40 and 38,431.20

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Solution

The fourth proportional to 91,048.80, 136,592.40 and 38,431.20 is: 57,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,048.80 : 136,592.40 = 38,431.20 : x
  2. Step 2: Convert to fraction form
    91,048.80/136,592.40 = 38,431.20/x
  3. Step 3: Cross multiply
    91,048.80x = 136,592.40 × 38,431.20
  4. Step 4: Simplify right side
    91,048.80x = 5,249,409,842.88
  5. Step 5: Solve for x
    x = 5,249,409,842.88/91,048.80
  6. Step 6: Final answer
    x = 57,654.90

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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.