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Finding the Fourth Proportional to 123,803.55, 170,853 and 70,087.47

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Solution

The fourth proportional to 123,803.55, 170,853 and 70,087.47 is: 96,723.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,803.55 : 170,853 = 70,087.47 : x
  2. Step 2: Convert to fraction form
    123,803.55/170,853 = 70,087.47/x
  3. Step 3: Cross multiply
    123,803.55x = 170,853 × 70,087.47
  4. Step 4: Simplify right side
    123,803.55x = 11,974,654,511.91
  5. Step 5: Solve for x
    x = 11,974,654,511.91/123,803.55
  6. Step 6: Final answer
    x = 96,723.03

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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.