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Finding the Fourth Proportional to 172,920.20, 258,602.70 and 144,926.60

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Solution

The fourth proportional to 172,920.20, 258,602.70 and 144,926.60 is: 216,738.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,920.20 : 258,602.70 = 144,926.60 : x
  2. Step 2: Convert to fraction form
    172,920.20/258,602.70 = 144,926.60/x
  3. Step 3: Cross multiply
    172,920.20x = 258,602.70 × 144,926.60
  4. Step 4: Simplify right side
    172,920.20x = 37,478,410,061.82
  5. Step 5: Solve for x
    x = 37,478,410,061.82/172,920.20
  6. Step 6: Final answer
    x = 216,738.18

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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.