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Finding the Fourth Proportional to 84,893.10, 127,246.65 and 42,705.90

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Solution

The fourth proportional to 84,893.10, 127,246.65 and 42,705.90 is: 64,012.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,893.10 : 127,246.65 = 42,705.90 : x
  2. Step 2: Convert to fraction form
    84,893.10/127,246.65 = 42,705.90/x
  3. Step 3: Cross multiply
    84,893.10x = 127,246.65 × 42,705.90
  4. Step 4: Simplify right side
    84,893.10x = 5,434,182,710.24
  5. Step 5: Solve for x
    x = 5,434,182,710.24/84,893.10
  6. Step 6: Final answer
    x = 64,012.07

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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.