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Finding the Fourth Proportional to 148,642.88, 205,113.60 and 88,203.12

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Solution

The fourth proportional to 148,642.88, 205,113.60 and 88,203.12 is: 121,712.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,642.88 : 205,113.60 = 88,203.12 : x
  2. Step 2: Convert to fraction form
    148,642.88/205,113.60 = 88,203.12/x
  3. Step 3: Cross multiply
    148,642.88x = 205,113.60 × 88,203.12
  4. Step 4: Simplify right side
    148,642.88x = 18,091,659,474.43
  5. Step 5: Solve for x
    x = 18,091,659,474.43/148,642.88
  6. Step 6: Final answer
    x = 121,712.25

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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.