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Finding the Fourth Proportional to 103,539.70, 155,309.55 and 91,073.80

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Solution

The fourth proportional to 103,539.70, 155,309.55 and 91,073.80 is: 136,610.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.70 : 155,309.55 = 91,073.80 : x
  2. Step 2: Convert to fraction form
    103,539.70/155,309.55 = 91,073.80/x
  3. Step 3: Cross multiply
    103,539.70x = 155,309.55 × 91,073.80
  4. Step 4: Simplify right side
    103,539.70x = 14,144,630,894.79
  5. Step 5: Solve for x
    x = 14,144,630,894.79/103,539.70
  6. Step 6: Final answer
    x = 136,610.70

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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.