Home / 137,998.08-190,436.40-78,382.08

Finding the Fourth Proportional to 137,998.08, 190,436.40 and 78,382.08

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Solution

The fourth proportional to 137,998.08, 190,436.40 and 78,382.08 is: 108,166.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,998.08 : 190,436.40 = 78,382.08 : x
  2. Step 2: Convert to fraction form
    137,998.08/190,436.40 = 78,382.08/x
  3. Step 3: Cross multiply
    137,998.08x = 190,436.40 × 78,382.08
  4. Step 4: Simplify right side
    137,998.08x = 14,926,801,139.71
  5. Step 5: Solve for x
    x = 14,926,801,139.71/137,998.08
  6. Step 6: Final answer
    x = 108,166.73

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1.5x scale

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.