Home / 85,398.12-128,175.30-43,307.25

Finding the Fourth Proportional to 85,398.12, 128,175.30 and 43,307.25

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Solution

The fourth proportional to 85,398.12, 128,175.30 and 43,307.25 is: 65,000.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,398.12 : 128,175.30 = 43,307.25 : x
  2. Step 2: Convert to fraction form
    85,398.12/128,175.30 = 43,307.25/x
  3. Step 3: Cross multiply
    85,398.12x = 128,175.30 × 43,307.25
  4. Step 4: Simplify right side
    85,398.12x = 5,550,919,760.93
  5. Step 5: Solve for x
    x = 5,550,919,760.93/85,398.12
  6. Step 6: Final answer
    x = 65,000.50

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1.5x scale

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.