Home / 142,458.30-213,687.45-128,680.20

Finding the Fourth Proportional to 142,458.30, 213,687.45 and 128,680.20

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Solution

The fourth proportional to 142,458.30, 213,687.45 and 128,680.20 is: 193,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,458.30 : 213,687.45 = 128,680.20 : x
  2. Step 2: Convert to fraction form
    142,458.30/213,687.45 = 128,680.20/x
  3. Step 3: Cross multiply
    142,458.30x = 213,687.45 × 128,680.20
  4. Step 4: Simplify right side
    142,458.30x = 27,497,343,803.49
  5. Step 5: Solve for x
    x = 27,497,343,803.49/142,458.30
  6. Step 6: Final answer
    x = 193,020.30

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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.