Home / 78,645.06-117,869.13-61,939.13

Finding the Fourth Proportional to 78,645.06, 117,869.13 and 61,939.13

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Solution

The fourth proportional to 78,645.06, 117,869.13 and 61,939.13 is: 92,831.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,645.06 : 117,869.13 = 61,939.13 : x
  2. Step 2: Convert to fraction form
    78,645.06/117,869.13 = 61,939.13/x
  3. Step 3: Cross multiply
    78,645.06x = 117,869.13 × 61,939.13
  4. Step 4: Simplify right side
    78,645.06x = 7,300,710,776.71
  5. Step 5: Solve for x
    x = 7,300,710,776.71/78,645.06
  6. Step 6: Final answer
    x = 92,831.14

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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.