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Finding the Fourth Proportional to 260,070.51, 390,065.93 and 82,554.51

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Solution

The fourth proportional to 260,070.51, 390,065.93 and 82,554.51 is: 123,819.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.51 : 390,065.93 = 82,554.51 : x
  2. Step 2: Convert to fraction form
    260,070.51/390,065.93 = 82,554.51/x
  3. Step 3: Cross multiply
    260,070.51x = 390,065.93 × 82,554.51
  4. Step 4: Simplify right side
    260,070.51x = 32,201,701,306.07
  5. Step 5: Solve for x
    x = 32,201,701,306.07/260,070.51
  6. Step 6: Final answer
    x = 123,819.12

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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.