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Finding the Fourth Proportional to 81,590.32, 112,575.45 and 47,578.42

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Solution

The fourth proportional to 81,590.32, 112,575.45 and 47,578.42 is: 65,647.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,590.32 : 112,575.45 = 47,578.42 : x
  2. Step 2: Convert to fraction form
    81,590.32/112,575.45 = 47,578.42/x
  3. Step 3: Cross multiply
    81,590.32x = 112,575.45 × 47,578.42
  4. Step 4: Simplify right side
    81,590.32x = 5,356,162,041.79
  5. Step 5: Solve for x
    x = 5,356,162,041.79/81,590.32
  6. Step 6: Final answer
    x = 65,647.03

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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.