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Finding the Fourth Proportional to 124,041.79, 171,104.59 and 78,028.09

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Solution

The fourth proportional to 124,041.79, 171,104.59 and 78,028.09 is: 107,632.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,041.79 : 171,104.59 = 78,028.09 : x
  2. Step 2: Convert to fraction form
    124,041.79/171,104.59 = 78,028.09/x
  3. Step 3: Cross multiply
    124,041.79x = 171,104.59 × 78,028.09
  4. Step 4: Simplify right side
    124,041.79x = 13,350,963,957.79
  5. Step 5: Solve for x
    x = 13,350,963,957.79/124,041.79
  6. Step 6: Final answer
    x = 107,632.79

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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.