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Finding the Fourth Proportional to 103,780.67, 155,566.98 and 40,513.80

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Solution

The fourth proportional to 103,780.67, 155,566.98 and 40,513.80 is: 60,730.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,780.67 : 155,566.98 = 40,513.80 : x
  2. Step 2: Convert to fraction form
    103,780.67/155,566.98 = 40,513.80/x
  3. Step 3: Cross multiply
    103,780.67x = 155,566.98 × 40,513.80
  4. Step 4: Simplify right side
    103,780.67x = 6,302,609,514.32
  5. Step 5: Solve for x
    x = 6,302,609,514.32/103,780.67
  6. Step 6: Final answer
    x = 60,730.09

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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.