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Finding the Fourth Proportional to 90,299.52, 135,403.76 and 52,870.88

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Solution

The fourth proportional to 90,299.52, 135,403.76 and 52,870.88 is: 79,279.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,299.52 : 135,403.76 = 52,870.88 : x
  2. Step 2: Convert to fraction form
    90,299.52/135,403.76 = 52,870.88/x
  3. Step 3: Cross multiply
    90,299.52x = 135,403.76 × 52,870.88
  4. Step 4: Simplify right side
    90,299.52x = 7,158,915,946.51
  5. Step 5: Solve for x
    x = 7,158,915,946.51/90,299.52
  6. Step 6: Final answer
    x = 79,279.67

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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.