Home / 137,895.12-190,295.16-78,279.12

Finding the Fourth Proportional to 137,895.12, 190,295.16 and 78,279.12

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Solution

The fourth proportional to 137,895.12, 190,295.16 and 78,279.12 is: 108,025.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,895.12 : 190,295.16 = 78,279.12 : x
  2. Step 2: Convert to fraction form
    137,895.12/190,295.16 = 78,279.12/x
  3. Step 3: Cross multiply
    137,895.12x = 190,295.16 × 78,279.12
  4. Step 4: Simplify right side
    137,895.12x = 14,896,137,665.06
  5. Step 5: Solve for x
    x = 14,896,137,665.06/137,895.12
  6. Step 6: Final answer
    x = 108,025.13

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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.