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Finding the Fourth Proportional to 128,153.61, 192,235.65 and 43,971.66

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Solution

The fourth proportional to 128,153.61, 192,235.65 and 43,971.66 is: 65,959.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,153.61 : 192,235.65 = 43,971.66 : x
  2. Step 2: Convert to fraction form
    128,153.61/192,235.65 = 43,971.66/x
  3. Step 3: Cross multiply
    128,153.61x = 192,235.65 × 43,971.66
  4. Step 4: Simplify right side
    128,153.61x = 8,452,920,641.68
  5. Step 5: Solve for x
    x = 8,452,920,641.68/128,153.61
  6. Step 6: Final answer
    x = 65,959.29

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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.