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Finding the Fourth Proportional to 70,691.76, 106,024.86 and 28,570.32

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Solution

The fourth proportional to 70,691.76, 106,024.86 and 28,570.32 is: 42,850.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,691.76 : 106,024.86 = 28,570.32 : x
  2. Step 2: Convert to fraction form
    70,691.76/106,024.86 = 28,570.32/x
  3. Step 3: Cross multiply
    70,691.76x = 106,024.86 × 28,570.32
  4. Step 4: Simplify right side
    70,691.76x = 3,029,164,178.16
  5. Step 5: Solve for x
    x = 3,029,164,178.16/70,691.76
  6. Step 6: Final answer
    x = 42,850.31

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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.