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Finding the Fourth Proportional to 103,925.80, 155,499.45 and 74,009.20

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Solution

The fourth proportional to 103,925.80, 155,499.45 and 74,009.20 is: 110,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,925.80 : 155,499.45 = 74,009.20 : x
  2. Step 2: Convert to fraction form
    103,925.80/155,499.45 = 74,009.20/x
  3. Step 3: Cross multiply
    103,925.80x = 155,499.45 × 74,009.20
  4. Step 4: Simplify right side
    103,925.80x = 11,508,389,894.94
  5. Step 5: Solve for x
    x = 11,508,389,894.94/103,925.80
  6. Step 6: Final answer
    x = 110,736.60

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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.