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Finding the Fourth Proportional to 172,810.80, 259,156.80 and 84,007.08

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Solution

The fourth proportional to 172,810.80, 259,156.80 and 84,007.08 is: 125,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,810.80 : 259,156.80 = 84,007.08 : x
  2. Step 2: Convert to fraction form
    172,810.80/259,156.80 = 84,007.08/x
  3. Step 3: Cross multiply
    172,810.80x = 259,156.80 × 84,007.08
  4. Step 4: Simplify right side
    172,810.80x = 21,771,006,030.14
  5. Step 5: Solve for x
    x = 21,771,006,030.14/172,810.80
  6. Step 6: Final answer
    x = 125,981.74

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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.