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Finding the Fourth Proportional to 90,401.44, 135,623.76 and 28,071.76

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Solution

The fourth proportional to 90,401.44, 135,623.76 and 28,071.76 is: 42,114.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,401.44 : 135,623.76 = 28,071.76 : x
  2. Step 2: Convert to fraction form
    90,401.44/135,623.76 = 28,071.76/x
  3. Step 3: Cross multiply
    90,401.44x = 135,623.76 × 28,071.76
  4. Step 4: Simplify right side
    90,401.44x = 3,807,197,641.02
  5. Step 5: Solve for x
    x = 3,807,197,641.02/90,401.44
  6. Step 6: Final answer
    x = 42,114.35

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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.