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Finding the Fourth Proportional to 245,085.80, 338,219.76 and 137,655.84

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Solution

The fourth proportional to 245,085.80, 338,219.76 and 137,655.84 is: 189,965.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,085.80 : 338,219.76 = 137,655.84 : x
  2. Step 2: Convert to fraction form
    245,085.80/338,219.76 = 137,655.84/x
  3. Step 3: Cross multiply
    245,085.80x = 338,219.76 × 137,655.84
  4. Step 4: Simplify right side
    245,085.80x = 46,557,925,167.40
  5. Step 5: Solve for x
    x = 46,557,925,167.40/245,085.80
  6. Step 6: Final answer
    x = 189,965.82

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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.