Home / 128,931.12-193,424.22-40,182.66

Finding the Fourth Proportional to 128,931.12, 193,424.22 and 40,182.66

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Solution

The fourth proportional to 128,931.12, 193,424.22 and 40,182.66 is: 60,282.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,931.12 : 193,424.22 = 40,182.66 : x
  2. Step 2: Convert to fraction form
    128,931.12/193,424.22 = 40,182.66/x
  3. Step 3: Cross multiply
    128,931.12x = 193,424.22 × 40,182.66
  4. Step 4: Simplify right side
    128,931.12x = 7,772,299,668.03
  5. Step 5: Solve for x
    x = 7,772,299,668.03/128,931.12
  6. Step 6: Final answer
    x = 60,282.57

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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.