Home / 66,531.20-99,681.60-43,145.60

Finding the Fourth Proportional to 66,531.20, 99,681.60 and 43,145.60

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Solution

The fourth proportional to 66,531.20, 99,681.60 and 43,145.60 is: 64,643.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.20 : 99,681.60 = 43,145.60 : x
  2. Step 2: Convert to fraction form
    66,531.20/99,681.60 = 43,145.60/x
  3. Step 3: Cross multiply
    66,531.20x = 99,681.60 × 43,145.60
  4. Step 4: Simplify right side
    66,531.20x = 4,300,822,440.96
  5. Step 5: Solve for x
    x = 4,300,822,440.96/66,531.20
  6. Step 6: Final answer
    x = 64,643.69

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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.