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Finding the Fourth Proportional to 111,503.12, 153,874.08 and 61,201.04

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Solution

The fourth proportional to 111,503.12, 153,874.08 and 61,201.04 is: 84,457.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,503.12 : 153,874.08 = 61,201.04 : x
  2. Step 2: Convert to fraction form
    111,503.12/153,874.08 = 61,201.04/x
  3. Step 3: Cross multiply
    111,503.12x = 153,874.08 × 61,201.04
  4. Step 4: Simplify right side
    111,503.12x = 9,417,253,725.04
  5. Step 5: Solve for x
    x = 9,417,253,725.04/111,503.12
  6. Step 6: Final answer
    x = 84,457.31

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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.