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Finding the Fourth Proportional to 65,870.20, 90,936.84 and 45,482.50

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Solution

The fourth proportional to 65,870.20, 90,936.84 and 45,482.50 is: 62,790.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,870.20 : 90,936.84 = 45,482.50 : x
  2. Step 2: Convert to fraction form
    65,870.20/90,936.84 = 45,482.50/x
  3. Step 3: Cross multiply
    65,870.20x = 90,936.84 × 45,482.50
  4. Step 4: Simplify right side
    65,870.20x = 4,136,034,825.30
  5. Step 5: Solve for x
    x = 4,136,034,825.30/65,870.20
  6. Step 6: Final answer
    x = 62,790.68

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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.