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Finding the Fourth Proportional to 228,618.17, 315,647.10 and 142,707.95

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Solution

The fourth proportional to 228,618.17, 315,647.10 and 142,707.95 is: 197,033.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,618.17 : 315,647.10 = 142,707.95 : x
  2. Step 2: Convert to fraction form
    228,618.17/315,647.10 = 142,707.95/x
  3. Step 3: Cross multiply
    228,618.17x = 315,647.10 × 142,707.95
  4. Step 4: Simplify right side
    228,618.17x = 45,045,350,564.45
  5. Step 5: Solve for x
    x = 45,045,350,564.45/228,618.17
  6. Step 6: Final answer
    x = 197,033.12

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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.