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Finding the Fourth Proportional to 228,713.76, 315,595.44 and 128,111.76

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Solution

The fourth proportional to 228,713.76, 315,595.44 and 128,111.76 is: 176,777.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,713.76 : 315,595.44 = 128,111.76 : x
  2. Step 2: Convert to fraction form
    228,713.76/315,595.44 = 128,111.76/x
  3. Step 3: Cross multiply
    228,713.76x = 315,595.44 × 128,111.76
  4. Step 4: Simplify right side
    228,713.76x = 40,431,487,266.37
  5. Step 5: Solve for x
    x = 40,431,487,266.37/228,713.76
  6. Step 6: Final answer
    x = 176,777.68

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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.