Home / 103,512.10-155,268.15-90,390.10

Finding the Fourth Proportional to 103,512.10, 155,268.15 and 90,390.10

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Solution

The fourth proportional to 103,512.10, 155,268.15 and 90,390.10 is: 135,585.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,512.10 : 155,268.15 = 90,390.10 : x
  2. Step 2: Convert to fraction form
    103,512.10/155,268.15 = 90,390.10/x
  3. Step 3: Cross multiply
    103,512.10x = 155,268.15 × 90,390.10
  4. Step 4: Simplify right side
    103,512.10x = 14,034,703,605.32
  5. Step 5: Solve for x
    x = 14,034,703,605.32/103,512.10
  6. Step 6: Final answer
    x = 135,585.15

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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.