Home / 137,981.13-190,414.13-78,365.13

Finding the Fourth Proportional to 137,981.13, 190,414.13 and 78,365.13

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Solution

The fourth proportional to 137,981.13, 190,414.13 and 78,365.13 is: 108,143.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,981.13 : 190,414.13 = 78,365.13 : x
  2. Step 2: Convert to fraction form
    137,981.13/190,414.13 = 78,365.13/x
  3. Step 3: Cross multiply
    137,981.13x = 190,414.13 × 78,365.13
  4. Step 4: Simplify right side
    137,981.13x = 14,921,828,051.29
  5. Step 5: Solve for x
    x = 14,921,828,051.29/137,981.13
  6. Step 6: Final answer
    x = 108,143.98

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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.