Home / 90,839.04-136,047.16-87,686.12

Finding the Fourth Proportional to 90,839.04, 136,047.16 and 87,686.12

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Solution

The fourth proportional to 90,839.04, 136,047.16 and 87,686.12 is: 131,325.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,839.04 : 136,047.16 = 87,686.12 : x
  2. Step 2: Convert to fraction form
    90,839.04/136,047.16 = 87,686.12/x
  3. Step 3: Cross multiply
    90,839.04x = 136,047.16 × 87,686.12
  4. Step 4: Simplify right side
    90,839.04x = 11,929,447,597.42
  5. Step 5: Solve for x
    x = 11,929,447,597.42/90,839.04
  6. Step 6: Final answer
    x = 131,325.12

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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.