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Finding the Fourth Proportional to 172,598.40, 258,994.80 and 67,403.70

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Solution

The fourth proportional to 172,598.40, 258,994.80 and 67,403.70 is: 101,143.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,598.40 : 258,994.80 = 67,403.70 : x
  2. Step 2: Convert to fraction form
    172,598.40/258,994.80 = 67,403.70/x
  3. Step 3: Cross multiply
    172,598.40x = 258,994.80 × 67,403.70
  4. Step 4: Simplify right side
    172,598.40x = 17,457,207,800.76
  5. Step 5: Solve for x
    x = 17,457,207,800.76/172,598.40
  6. Step 6: Final answer
    x = 101,143.51

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1.5x scale

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.