Home / 153,728.20-212,176.02-90,120.52

Finding the Fourth Proportional to 153,728.20, 212,176.02 and 90,120.52

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Solution

The fourth proportional to 153,728.20, 212,176.02 and 90,120.52 is: 124,384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,728.20 : 212,176.02 = 90,120.52 : x
  2. Step 2: Convert to fraction form
    153,728.20/212,176.02 = 90,120.52/x
  3. Step 3: Cross multiply
    153,728.20x = 212,176.02 × 90,120.52
  4. Step 4: Simplify right side
    153,728.20x = 19,121,413,253.93
  5. Step 5: Solve for x
    x = 19,121,413,253.93/153,728.20
  6. Step 6: Final answer
    x = 124,384.55

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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.