Home / 103,478.10-155,217.15-86,747.55

Finding the Fourth Proportional to 103,478.10, 155,217.15 and 86,747.55

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Solution

The fourth proportional to 103,478.10, 155,217.15 and 86,747.55 is: 130,121.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,478.10 : 155,217.15 = 86,747.55 : x
  2. Step 2: Convert to fraction form
    103,478.10/155,217.15 = 86,747.55/x
  3. Step 3: Cross multiply
    103,478.10x = 155,217.15 × 86,747.55
  4. Step 4: Simplify right side
    103,478.10x = 13,464,707,480.48
  5. Step 5: Solve for x
    x = 13,464,707,480.48/103,478.10
  6. Step 6: Final answer
    x = 130,121.33

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1.5x scale

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.