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Finding the Fourth Proportional to 353,152.79, 530,062.09 and 128,730.14

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Solution

The fourth proportional to 353,152.79, 530,062.09 and 128,730.14 is: 193,216.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,152.79 : 530,062.09 = 128,730.14 : x
  2. Step 2: Convert to fraction form
    353,152.79/530,062.09 = 128,730.14/x
  3. Step 3: Cross multiply
    353,152.79x = 530,062.09 × 128,730.14
  4. Step 4: Simplify right side
    353,152.79x = 68,234,964,082.26
  5. Step 5: Solve for x
    x = 68,234,964,082.26/353,152.79
  6. Step 6: Final answer
    x = 193,216.55

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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.