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Finding the Fourth Proportional to 112,158, 154,781.28 and 61,860.24

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Solution

The fourth proportional to 112,158, 154,781.28 and 61,860.24 is: 85,368.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,158 : 154,781.28 = 61,860.24 : x
  2. Step 2: Convert to fraction form
    112,158/154,781.28 = 61,860.24/x
  3. Step 3: Cross multiply
    112,158x = 154,781.28 × 61,860.24
  4. Step 4: Simplify right side
    112,158x = 9,574,807,128.31
  5. Step 5: Solve for x
    x = 9,574,807,128.31/112,158
  6. Step 6: Final answer
    x = 85,368.92

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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.