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Finding the Fourth Proportional to 103,520, 142,799.28 and 67,701.80

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Solution

The fourth proportional to 103,520, 142,799.28 and 67,701.80 is: 93,390.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,520 : 142,799.28 = 67,701.80 : x
  2. Step 2: Convert to fraction form
    103,520/142,799.28 = 67,701.80/x
  3. Step 3: Cross multiply
    103,520x = 142,799.28 × 67,701.80
  4. Step 4: Simplify right side
    103,520x = 9,667,768,294.70
  5. Step 5: Solve for x
    x = 9,667,768,294.70/103,520
  6. Step 6: Final answer
    x = 93,390.34

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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.