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Finding the Fourth Proportional to 92,486.80, 138,730.20 and 79,364.80

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Solution

The fourth proportional to 92,486.80, 138,730.20 and 79,364.80 is: 119,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,486.80 : 138,730.20 = 79,364.80 : x
  2. Step 2: Convert to fraction form
    92,486.80/138,730.20 = 79,364.80/x
  3. Step 3: Cross multiply
    92,486.80x = 138,730.20 × 79,364.80
  4. Step 4: Simplify right side
    92,486.80x = 11,010,294,576.96
  5. Step 5: Solve for x
    x = 11,010,294,576.96/92,486.80
  6. Step 6: Final answer
    x = 119,047.20

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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.