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Finding the Fourth Proportional to 98,718.86, 136,231.50 and 53,396.78

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Solution

The fourth proportional to 98,718.86, 136,231.50 and 53,396.78 is: 73,687.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,718.86 : 136,231.50 = 53,396.78 : x
  2. Step 2: Convert to fraction form
    98,718.86/136,231.50 = 53,396.78/x
  3. Step 3: Cross multiply
    98,718.86x = 136,231.50 × 53,396.78
  4. Step 4: Simplify right side
    98,718.86x = 7,274,323,434.57
  5. Step 5: Solve for x
    x = 7,274,323,434.57/98,718.86
  6. Step 6: Final answer
    x = 73,687.27

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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.