Home / 103,637.85-155,456.78-91,390.65

Finding the Fourth Proportional to 103,637.85, 155,456.78 and 91,390.65

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Solution

The fourth proportional to 103,637.85, 155,456.78 and 91,390.65 is: 137,085.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,637.85 : 155,456.78 = 91,390.65 : x
  2. Step 2: Convert to fraction form
    103,637.85/155,456.78 = 91,390.65/x
  3. Step 3: Cross multiply
    103,637.85x = 155,456.78 × 91,390.65
  4. Step 4: Simplify right side
    103,637.85x = 14,207,296,171.11
  5. Step 5: Solve for x
    x = 14,207,296,171.11/103,637.85
  6. Step 6: Final answer
    x = 137,085.98

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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.