Home / 102,001.70-153,002.55-78,382.10

Finding the Fourth Proportional to 102,001.70, 153,002.55 and 78,382.10

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Solution

The fourth proportional to 102,001.70, 153,002.55 and 78,382.10 is: 117,573.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,001.70 : 153,002.55 = 78,382.10 : x
  2. Step 2: Convert to fraction form
    102,001.70/153,002.55 = 78,382.10/x
  3. Step 3: Cross multiply
    102,001.70x = 153,002.55 × 78,382.10
  4. Step 4: Simplify right side
    102,001.70x = 11,992,661,174.36
  5. Step 5: Solve for x
    x = 11,992,661,174.36/102,001.70
  6. Step 6: Final answer
    x = 117,573.15

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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.