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Finding the Fourth Proportional to 78,857.84, 118,288.56 and 26,271.56

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Solution

The fourth proportional to 78,857.84, 118,288.56 and 26,271.56 is: 39,407.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857.84 : 118,288.56 = 26,271.56 : x
  2. Step 2: Convert to fraction form
    78,857.84/118,288.56 = 26,271.56/x
  3. Step 3: Cross multiply
    78,857.84x = 118,288.56 × 26,271.56
  4. Step 4: Simplify right side
    78,857.84x = 3,107,625,001.35
  5. Step 5: Solve for x
    x = 3,107,625,001.35/78,857.84
  6. Step 6: Final answer
    x = 39,407.94

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1.5x scale

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.