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Finding the Fourth Proportional to 228,810.76, 315,758.92 and 139,386.76

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Solution

The fourth proportional to 228,810.76, 315,758.92 and 139,386.76 is: 192,353.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,810.76 : 315,758.92 = 139,386.76 : x
  2. Step 2: Convert to fraction form
    228,810.76/315,758.92 = 139,386.76/x
  3. Step 3: Cross multiply
    228,810.76x = 315,758.92 × 139,386.76
  4. Step 4: Simplify right side
    228,810.76x = 44,012,612,799.90
  5. Step 5: Solve for x
    x = 44,012,612,799.90/228,810.76
  6. Step 6: Final answer
    x = 192,353.77

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1.5x scale

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.