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Finding the Fourth Proportional to 111,214.76, 153,427.23 and 87,410.61

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Solution

The fourth proportional to 111,214.76, 153,427.23 and 87,410.61 is: 120,588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,214.76 : 153,427.23 = 87,410.61 : x
  2. Step 2: Convert to fraction form
    111,214.76/153,427.23 = 87,410.61/x
  3. Step 3: Cross multiply
    111,214.76x = 153,427.23 × 87,410.61
  4. Step 4: Simplify right side
    111,214.76x = 13,411,167,764.91
  5. Step 5: Solve for x
    x = 13,411,167,764.91/111,214.76
  6. Step 6: Final answer
    x = 120,588.03

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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.