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Finding the Fourth Proportional to 172,030.84, 257,941.46 and 77,242.61

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Solution

The fourth proportional to 172,030.84, 257,941.46 and 77,242.61 is: 115,816.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,030.84 : 257,941.46 = 77,242.61 : x
  2. Step 2: Convert to fraction form
    172,030.84/257,941.46 = 77,242.61/x
  3. Step 3: Cross multiply
    172,030.84x = 257,941.46 × 77,242.61
  4. Step 4: Simplify right side
    172,030.84x = 19,924,072,435.57
  5. Step 5: Solve for x
    x = 19,924,072,435.57/172,030.84
  6. Step 6: Final answer
    x = 115,816.87

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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.