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Finding the Fourth Proportional to 315,129.56, 472,622.36 and 90,488.22

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Solution

The fourth proportional to 315,129.56, 472,622.36 and 90,488.22 is: 135,711.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,129.56 : 472,622.36 = 90,488.22 : x
  2. Step 2: Convert to fraction form
    315,129.56/472,622.36 = 90,488.22/x
  3. Step 3: Cross multiply
    315,129.56x = 472,622.36 × 90,488.22
  4. Step 4: Simplify right side
    315,129.56x = 42,766,756,088.60
  5. Step 5: Solve for x
    x = 42,766,756,088.60/315,129.56
  6. Step 6: Final answer
    x = 135,711.66

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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.