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Finding the Fourth Proportional to 70,699.52, 106,085.60 and 39,103.76

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Solution

The fourth proportional to 70,699.52, 106,085.60 and 39,103.76 is: 58,675.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,699.52 : 106,085.60 = 39,103.76 : x
  2. Step 2: Convert to fraction form
    70,699.52/106,085.60 = 39,103.76/x
  3. Step 3: Cross multiply
    70,699.52x = 106,085.60 × 39,103.76
  4. Step 4: Simplify right side
    70,699.52x = 4,148,345,841.86
  5. Step 5: Solve for x
    x = 4,148,345,841.86/70,699.52
  6. Step 6: Final answer
    x = 58,675.73

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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.