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Finding the Fourth Proportional to 124,798.78, 172,219.76 and 68,210.56

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Solution

The fourth proportional to 124,798.78, 172,219.76 and 68,210.56 is: 94,129.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,798.78 : 172,219.76 = 68,210.56 : x
  2. Step 2: Convert to fraction form
    124,798.78/172,219.76 = 68,210.56/x
  3. Step 3: Cross multiply
    124,798.78x = 172,219.76 × 68,210.56
  4. Step 4: Simplify right side
    124,798.78x = 11,747,206,272.67
  5. Step 5: Solve for x
    x = 11,747,206,272.67/124,798.78
  6. Step 6: Final answer
    x = 94,129.18

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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.