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Finding the Fourth Proportional to 84,915, 127,372.50 and 26,547

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Solution

The fourth proportional to 84,915, 127,372.50 and 26,547 is: 39,820.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,915 : 127,372.50 = 26,547 : x
  2. Step 2: Convert to fraction form
    84,915/127,372.50 = 26,547/x
  3. Step 3: Cross multiply
    84,915x = 127,372.50 × 26,547
  4. Step 4: Simplify right side
    84,915x = 3,381,357,757.50
  5. Step 5: Solve for x
    x = 3,381,357,757.50/84,915
  6. Step 6: Final answer
    x = 39,820.50

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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.