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Finding the Fourth Proportional to 83,130.40, 124,436.40 and 80,538.40

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Solution

The fourth proportional to 83,130.40, 124,436.40 and 80,538.40 is: 120,556.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,130.40 : 124,436.40 = 80,538.40 : x
  2. Step 2: Convert to fraction form
    83,130.40/124,436.40 = 80,538.40/x
  3. Step 3: Cross multiply
    83,130.40x = 124,436.40 × 80,538.40
  4. Step 4: Simplify right side
    83,130.40x = 10,021,908,557.76
  5. Step 5: Solve for x
    x = 10,021,908,557.76/83,130.40
  6. Step 6: Final answer
    x = 120,556.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.