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Finding the Fourth Proportional to 83,642.91, 115,424.64 and 45,400.65

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Solution

The fourth proportional to 83,642.91, 115,424.64 and 45,400.65 is: 62,651.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,642.91 : 115,424.64 = 45,400.65 : x
  2. Step 2: Convert to fraction form
    83,642.91/115,424.64 = 45,400.65/x
  3. Step 3: Cross multiply
    83,642.91x = 115,424.64 × 45,400.65
  4. Step 4: Simplify right side
    83,642.91x = 5,240,353,682.02
  5. Step 5: Solve for x
    x = 5,240,353,682.02/83,642.91
  6. Step 6: Final answer
    x = 62,651.50

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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.