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Finding the Fourth Proportional to 112,578.62, 155,357.93 and 61,590.42

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Solution

The fourth proportional to 112,578.62, 155,357.93 and 61,590.42 is: 84,994.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,578.62 : 155,357.93 = 61,590.42 : x
  2. Step 2: Convert to fraction form
    112,578.62/155,357.93 = 61,590.42/x
  3. Step 3: Cross multiply
    112,578.62x = 155,357.93 × 61,590.42
  4. Step 4: Simplify right side
    112,578.62x = 9,568,559,851.08
  5. Step 5: Solve for x
    x = 9,568,559,851.08/112,578.62
  6. Step 6: Final answer
    x = 84,994.47

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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.