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Finding the Fourth Proportional to 65,430.40, 90,299.28 and 36,752.80

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Solution

The fourth proportional to 65,430.40, 90,299.28 and 36,752.80 is: 50,721.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,430.40 : 90,299.28 = 36,752.80 : x
  2. Step 2: Convert to fraction form
    65,430.40/90,299.28 = 36,752.80/x
  3. Step 3: Cross multiply
    65,430.40x = 90,299.28 × 36,752.80
  4. Step 4: Simplify right side
    65,430.40x = 3,318,751,377.98
  5. Step 5: Solve for x
    x = 3,318,751,377.98/65,430.40
  6. Step 6: Final answer
    x = 50,721.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.