Home / 90,710.28-136,047.65-86,209.51

Finding the Fourth Proportional to 90,710.28, 136,047.65 and 86,209.51

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Solution

The fourth proportional to 90,710.28, 136,047.65 and 86,209.51 is: 129,297.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,710.28 : 136,047.65 = 86,209.51 : x
  2. Step 2: Convert to fraction form
    90,710.28/136,047.65 = 86,209.51/x
  3. Step 3: Cross multiply
    90,710.28x = 136,047.65 × 86,209.51
  4. Step 4: Simplify right side
    90,710.28x = 11,728,600,982.16
  5. Step 5: Solve for x
    x = 11,728,600,982.16/90,710.28
  6. Step 6: Final answer
    x = 129,297.38

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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.