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Finding the Fourth Proportional to 124,175.16, 171,289.08 and 90,144

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Solution

The fourth proportional to 124,175.16, 171,289.08 and 90,144 is: 124,345.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,175.16 : 171,289.08 = 90,144 : x
  2. Step 2: Convert to fraction form
    124,175.16/171,289.08 = 90,144/x
  3. Step 3: Cross multiply
    124,175.16x = 171,289.08 × 90,144
  4. Step 4: Simplify right side
    124,175.16x = 15,440,682,827.52
  5. Step 5: Solve for x
    x = 15,440,682,827.52/124,175.16
  6. Step 6: Final answer
    x = 124,345.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.