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Finding the Fourth Proportional to 128,953.61, 193,458.06 and 38,988.63

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Solution

The fourth proportional to 128,953.61, 193,458.06 and 38,988.63 is: 58,491.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,953.61 : 193,458.06 = 38,988.63 : x
  2. Step 2: Convert to fraction form
    128,953.61/193,458.06 = 38,988.63/x
  3. Step 3: Cross multiply
    128,953.61x = 193,458.06 × 38,988.63
  4. Step 4: Simplify right side
    128,953.61x = 7,542,665,447.33
  5. Step 5: Solve for x
    x = 7,542,665,447.33/128,953.61
  6. Step 6: Final answer
    x = 58,491.31

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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.