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Finding the Fourth Proportional to 86,878.90, 119,818.20 and 68,945.50

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Solution

The fourth proportional to 86,878.90, 119,818.20 and 68,945.50 is: 95,085.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,878.90 : 119,818.20 = 68,945.50 : x
  2. Step 2: Convert to fraction form
    86,878.90/119,818.20 = 68,945.50/x
  3. Step 3: Cross multiply
    86,878.90x = 119,818.20 × 68,945.50
  4. Step 4: Simplify right side
    86,878.90x = 8,260,925,708.10
  5. Step 5: Solve for x
    x = 8,260,925,708.10/86,878.90
  6. Step 6: Final answer
    x = 95,085.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.