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Finding the Fourth Proportional to 70,572.67, 105,778.47 and 28,425.76

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Solution

The fourth proportional to 70,572.67, 105,778.47 and 28,425.76 is: 42,606.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,572.67 : 105,778.47 = 28,425.76 : x
  2. Step 2: Convert to fraction form
    70,572.67/105,778.47 = 28,425.76/x
  3. Step 3: Cross multiply
    70,572.67x = 105,778.47 × 28,425.76
  4. Step 4: Simplify right side
    70,572.67x = 3,006,833,401.39
  5. Step 5: Solve for x
    x = 3,006,833,401.39/70,572.67
  6. Step 6: Final answer
    x = 42,606.20

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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.