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Finding the Fourth Proportional to 70,148.90, 96,781.47 and 39,926.65

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Solution

The fourth proportional to 70,148.90, 96,781.47 and 39,926.65 is: 55,085.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,148.90 : 96,781.47 = 39,926.65 : x
  2. Step 2: Convert to fraction form
    70,148.90/96,781.47 = 39,926.65/x
  3. Step 3: Cross multiply
    70,148.90x = 96,781.47 × 39,926.65
  4. Step 4: Simplify right side
    70,148.90x = 3,864,159,879.18
  5. Step 5: Solve for x
    x = 3,864,159,879.18/70,148.90
  6. Step 6: Final answer
    x = 55,085.11

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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.