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Finding the Fourth Proportional to 210,545.52, 315,867.85 and 68,390.35

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Solution

The fourth proportional to 210,545.52, 315,867.85 and 68,390.35 is: 102,601.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,545.52 : 315,867.85 = 68,390.35 : x
  2. Step 2: Convert to fraction form
    210,545.52/315,867.85 = 68,390.35/x
  3. Step 3: Cross multiply
    210,545.52x = 315,867.85 × 68,390.35
  4. Step 4: Simplify right side
    210,545.52x = 21,602,312,815.25
  5. Step 5: Solve for x
    x = 21,602,312,815.25/210,545.52
  6. Step 6: Final answer
    x = 102,601.63

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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.