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Finding the Fourth Proportional to 228,656, 315,545.36 and 128,054

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Solution

The fourth proportional to 228,656, 315,545.36 and 128,054 is: 176,714.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,656 : 315,545.36 = 128,054 : x
  2. Step 2: Convert to fraction form
    228,656/315,545.36 = 128,054/x
  3. Step 3: Cross multiply
    228,656x = 315,545.36 × 128,054
  4. Step 4: Simplify right side
    228,656x = 40,406,845,529.44
  5. Step 5: Solve for x
    x = 40,406,845,529.44/228,656
  6. Step 6: Final answer
    x = 176,714.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.