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Finding the Fourth Proportional to 353,158.66, 530,070.90 and 128,736.02

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Solution

The fourth proportional to 353,158.66, 530,070.90 and 128,736.02 is: 193,225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,158.66 : 530,070.90 = 128,736.02 : x
  2. Step 2: Convert to fraction form
    353,158.66/530,070.90 = 128,736.02/x
  3. Step 3: Cross multiply
    353,158.66x = 530,070.90 × 128,736.02
  4. Step 4: Simplify right side
    353,158.66x = 68,239,217,983.82
  5. Step 5: Solve for x
    x = 68,239,217,983.82/353,158.66
  6. Step 6: Final answer
    x = 193,225.38

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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.