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Finding the Fourth Proportional to 65,389.80, 90,223.56 and 41,507.76

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Solution

The fourth proportional to 65,389.80, 90,223.56 and 41,507.76 is: 57,271.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,389.80 : 90,223.56 = 41,507.76 : x
  2. Step 2: Convert to fraction form
    65,389.80/90,223.56 = 41,507.76/x
  3. Step 3: Cross multiply
    65,389.80x = 90,223.56 × 41,507.76
  4. Step 4: Simplify right side
    65,389.80x = 3,744,977,874.83
  5. Step 5: Solve for x
    x = 3,744,977,874.83/65,389.80
  6. Step 6: Final answer
    x = 57,271.59

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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.