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Finding the Fourth Proportional to 172,292.88, 258,389.40 and 67,088.40

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Solution

The fourth proportional to 172,292.88, 258,389.40 and 67,088.40 is: 100,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,292.88 : 258,389.40 = 67,088.40 : x
  2. Step 2: Convert to fraction form
    172,292.88/258,389.40 = 67,088.40/x
  3. Step 3: Cross multiply
    172,292.88x = 258,389.40 × 67,088.40
  4. Step 4: Simplify right side
    172,292.88x = 17,334,931,422.96
  5. Step 5: Solve for x
    x = 17,334,931,422.96/172,292.88
  6. Step 6: Final answer
    x = 100,613.16

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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.