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Finding the Fourth Proportional to 205,155.40, 307,560.30 and 106,659.40

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Solution

The fourth proportional to 205,155.40, 307,560.30 and 106,659.40 is: 159,899.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,155.40 : 307,560.30 = 106,659.40 : x
  2. Step 2: Convert to fraction form
    205,155.40/307,560.30 = 106,659.40/x
  3. Step 3: Cross multiply
    205,155.40x = 307,560.30 × 106,659.40
  4. Step 4: Simplify right side
    205,155.40x = 32,804,197,061.82
  5. Step 5: Solve for x
    x = 32,804,197,061.82/205,155.40
  6. Step 6: Final answer
    x = 159,899.26

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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.