Home / 103,986.10-155,979.15-90,864.10

Finding the Fourth Proportional to 103,986.10, 155,979.15 and 90,864.10

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Solution

The fourth proportional to 103,986.10, 155,979.15 and 90,864.10 is: 136,296.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,986.10 : 155,979.15 = 90,864.10 : x
  2. Step 2: Convert to fraction form
    103,986.10/155,979.15 = 90,864.10/x
  3. Step 3: Cross multiply
    103,986.10x = 155,979.15 × 90,864.10
  4. Step 4: Simplify right side
    103,986.10x = 14,172,905,083.52
  5. Step 5: Solve for x
    x = 14,172,905,083.52/103,986.10
  6. Step 6: Final answer
    x = 136,296.15

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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.