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Finding the Fourth Proportional to 84,705.68, 127,030.48 and 28,531.85

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Solution

The fourth proportional to 84,705.68, 127,030.48 and 28,531.85 is: 42,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,705.68 : 127,030.48 = 28,531.85 : x
  2. Step 2: Convert to fraction form
    84,705.68/127,030.48 = 28,531.85/x
  3. Step 3: Cross multiply
    84,705.68x = 127,030.48 × 28,531.85
  4. Step 4: Simplify right side
    84,705.68x = 3,624,413,894.31
  5. Step 5: Solve for x
    x = 3,624,413,894.31/84,705.68
  6. Step 6: Final answer
    x = 42,788.32

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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.