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Finding the Fourth Proportional to 228,407.76, 342,621.24 and 70,639.20

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Solution

The fourth proportional to 228,407.76, 342,621.24 and 70,639.20 is: 105,961.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,407.76 : 342,621.24 = 70,639.20 : x
  2. Step 2: Convert to fraction form
    228,407.76/342,621.24 = 70,639.20/x
  3. Step 3: Cross multiply
    228,407.76x = 342,621.24 × 70,639.20
  4. Step 4: Simplify right side
    228,407.76x = 24,202,490,296.61
  5. Step 5: Solve for x
    x = 24,202,490,296.61/228,407.76
  6. Step 6: Final answer
    x = 105,961.77

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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.