Home / 98,709.28-136,218.40-53,387.31

Finding the Fourth Proportional to 98,709.28, 136,218.40 and 53,387.31

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Solution

The fourth proportional to 98,709.28, 136,218.40 and 53,387.31 is: 73,674.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,709.28 : 136,218.40 = 53,387.31 : x
  2. Step 2: Convert to fraction form
    98,709.28/136,218.40 = 53,387.31/x
  3. Step 3: Cross multiply
    98,709.28x = 136,218.40 × 53,387.31
  4. Step 4: Simplify right side
    98,709.28x = 7,272,333,815.04
  5. Step 5: Solve for x
    x = 7,272,333,815.04/98,709.28
  6. Step 6: Final answer
    x = 73,674.27

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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.