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Finding the Fourth Proportional to 84,438.34, 126,802.56 and 74,971.98

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Solution

The fourth proportional to 84,438.34, 126,802.56 and 74,971.98 is: 112,586.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,438.34 : 126,802.56 = 74,971.98 : x
  2. Step 2: Convert to fraction form
    84,438.34/126,802.56 = 74,971.98/x
  3. Step 3: Cross multiply
    84,438.34x = 126,802.56 × 74,971.98
  4. Step 4: Simplify right side
    84,438.34x = 9,506,638,992.27
  5. Step 5: Solve for x
    x = 9,506,638,992.27/84,438.34
  6. Step 6: Final answer
    x = 112,586.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.