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Finding the Fourth Proportional to 172,989.60, 238,684.93 and 105,004.90

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Solution

The fourth proportional to 172,989.60, 238,684.93 and 105,004.90 is: 144,882.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,989.60 : 238,684.93 = 105,004.90 : x
  2. Step 2: Convert to fraction form
    172,989.60/238,684.93 = 105,004.90/x
  3. Step 3: Cross multiply
    172,989.60x = 238,684.93 × 105,004.90
  4. Step 4: Simplify right side
    172,989.60x = 25,063,087,206.16
  5. Step 5: Solve for x
    x = 25,063,087,206.16/172,989.60
  6. Step 6: Final answer
    x = 144,882.05

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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.