Home / 152,201.28-209,990.16-91,790.40

Finding the Fourth Proportional to 152,201.28, 209,990.16 and 91,790.40

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Solution

The fourth proportional to 152,201.28, 209,990.16 and 91,790.40 is: 126,642.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,201.28 : 209,990.16 = 91,790.40 : x
  2. Step 2: Convert to fraction form
    152,201.28/209,990.16 = 91,790.40/x
  3. Step 3: Cross multiply
    152,201.28x = 209,990.16 × 91,790.40
  4. Step 4: Simplify right side
    152,201.28x = 19,275,080,782.46
  5. Step 5: Solve for x
    x = 19,275,080,782.46/152,201.28
  6. Step 6: Final answer
    x = 126,642.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.