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Finding the Fourth Proportional to 98,709.53, 136,218.74 and 53,387.56

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Solution

The fourth proportional to 98,709.53, 136,218.74 and 53,387.56 is: 73,674.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,709.53 : 136,218.74 = 53,387.56 : x
  2. Step 2: Convert to fraction form
    98,709.53/136,218.74 = 53,387.56/x
  3. Step 3: Cross multiply
    98,709.53x = 136,218.74 × 53,387.56
  4. Step 4: Simplify right side
    98,709.53x = 7,272,386,154.87
  5. Step 5: Solve for x
    x = 7,272,386,154.87/98,709.53
  6. Step 6: Final answer
    x = 73,674.61

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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.