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Finding the Fourth Proportional to 128,398.74, 192,223.35 and 74,926.86

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Solution

The fourth proportional to 128,398.74, 192,223.35 and 74,926.86 is: 112,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,398.74 : 192,223.35 = 74,926.86 : x
  2. Step 2: Convert to fraction form
    128,398.74/192,223.35 = 74,926.86/x
  3. Step 3: Cross multiply
    128,398.74x = 192,223.35 × 74,926.86
  4. Step 4: Simplify right side
    128,398.74x = 14,402,692,034.18
  5. Step 5: Solve for x
    x = 14,402,692,034.18/128,398.74
  6. Step 6: Final answer
    x = 112,171.60

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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.