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Finding the Fourth Proportional to 65,262.70, 90,075 and 38,406.34

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Solution

The fourth proportional to 65,262.70, 90,075 and 38,406.34 is: 53,008.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,262.70 : 90,075 = 38,406.34 : x
  2. Step 2: Convert to fraction form
    65,262.70/90,075 = 38,406.34/x
  3. Step 3: Cross multiply
    65,262.70x = 90,075 × 38,406.34
  4. Step 4: Simplify right side
    65,262.70x = 3,459,451,075.50
  5. Step 5: Solve for x
    x = 3,459,451,075.50/65,262.70
  6. Step 6: Final answer
    x = 53,008.09

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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.