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Finding the Fourth Proportional to 78,985.76, 118,484.76 and 26,395.43

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Solution

The fourth proportional to 78,985.76, 118,484.76 and 26,395.43 is: 39,595.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.76 : 118,484.76 = 26,395.43 : x
  2. Step 2: Convert to fraction form
    78,985.76/118,484.76 = 26,395.43/x
  3. Step 3: Cross multiply
    78,985.76x = 118,484.76 × 26,395.43
  4. Step 4: Simplify right side
    78,985.76x = 3,127,456,188.65
  5. Step 5: Solve for x
    x = 3,127,456,188.65/78,985.76
  6. Step 6: Final answer
    x = 39,595.19

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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.