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Finding the Fourth Proportional to 315,141.23, 472,699.55 and 90,500.79

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Solution

The fourth proportional to 315,141.23, 472,699.55 and 90,500.79 is: 135,747.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,141.23 : 472,699.55 = 90,500.79 : x
  2. Step 2: Convert to fraction form
    315,141.23/472,699.55 = 90,500.79/x
  3. Step 3: Cross multiply
    315,141.23x = 472,699.55 × 90,500.79
  4. Step 4: Simplify right side
    315,141.23x = 42,779,684,197.45
  5. Step 5: Solve for x
    x = 42,779,684,197.45/315,141.23
  6. Step 6: Final answer
    x = 135,747.66

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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.