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Finding the Fourth Proportional to 353,153.16, 530,062.65 and 128,730.51

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Solution

The fourth proportional to 353,153.16, 530,062.65 and 128,730.51 is: 193,217.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,153.16 : 530,062.65 = 128,730.51 : x
  2. Step 2: Convert to fraction form
    353,153.16/530,062.65 = 128,730.51/x
  3. Step 3: Cross multiply
    353,153.16x = 530,062.65 × 128,730.51
  4. Step 4: Simplify right side
    353,153.16x = 68,235,235,266.45
  5. Step 5: Solve for x
    x = 68,235,235,266.45/353,153.16
  6. Step 6: Final answer
    x = 193,217.12

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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.