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Finding the Fourth Proportional to 228,117.35, 342,178.76 and 138,179.71

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Solution

The fourth proportional to 228,117.35, 342,178.76 and 138,179.71 is: 207,271.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,117.35 : 342,178.76 = 138,179.71 : x
  2. Step 2: Convert to fraction form
    228,117.35/342,178.76 = 138,179.71/x
  3. Step 3: Cross multiply
    228,117.35x = 342,178.76 × 138,179.71
  4. Step 4: Simplify right side
    228,117.35x = 47,282,161,824.96
  5. Step 5: Solve for x
    x = 47,282,161,824.96/228,117.35
  6. Step 6: Final answer
    x = 207,271.22

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1.5x scale

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.