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Finding the Fourth Proportional to 208,111.80, 312,167.70 and 185,950.20

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Solution

The fourth proportional to 208,111.80, 312,167.70 and 185,950.20 is: 278,925.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,111.80 : 312,167.70 = 185,950.20 : x
  2. Step 2: Convert to fraction form
    208,111.80/312,167.70 = 185,950.20/x
  3. Step 3: Cross multiply
    208,111.80x = 312,167.70 × 185,950.20
  4. Step 4: Simplify right side
    208,111.80x = 58,047,646,248.54
  5. Step 5: Solve for x
    x = 58,047,646,248.54/208,111.80
  6. Step 6: Final answer
    x = 278,925.30

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1.5x scale

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.