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Finding the Fourth Proportional to 111,858.10, 154,364.13 and 61,557.10

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Solution

The fourth proportional to 111,858.10, 154,364.13 and 61,557.10 is: 84,948.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,858.10 : 154,364.13 = 61,557.10 : x
  2. Step 2: Convert to fraction form
    111,858.10/154,364.13 = 61,557.10/x
  3. Step 3: Cross multiply
    111,858.10x = 154,364.13 × 61,557.10
  4. Step 4: Simplify right side
    111,858.10x = 9,502,207,800.91
  5. Step 5: Solve for x
    x = 9,502,207,800.91/111,858.10
  6. Step 6: Final answer
    x = 84,948.77

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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.