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Finding the Fourth Proportional to 124,728.31, 172,133 and 71,018.02

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Solution

The fourth proportional to 124,728.31, 172,133 and 71,018.02 is: 98,009.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,728.31 : 172,133 = 71,018.02 : x
  2. Step 2: Convert to fraction form
    124,728.31/172,133 = 71,018.02/x
  3. Step 3: Cross multiply
    124,728.31x = 172,133 × 71,018.02
  4. Step 4: Simplify right side
    124,728.31x = 12,224,544,836.66
  5. Step 5: Solve for x
    x = 12,224,544,836.66/124,728.31
  6. Step 6: Final answer
    x = 98,009.38

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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.