Home / 85,909.23-128,839.14-35,988.12

Finding the Fourth Proportional to 85,909.23, 128,839.14 and 35,988.12

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Solution

The fourth proportional to 85,909.23, 128,839.14 and 35,988.12 is: 53,971.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.23 : 128,839.14 = 35,988.12 : x
  2. Step 2: Convert to fraction form
    85,909.23/128,839.14 = 35,988.12/x
  3. Step 3: Cross multiply
    85,909.23x = 128,839.14 × 35,988.12
  4. Step 4: Simplify right side
    85,909.23x = 4,636,678,431.02
  5. Step 5: Solve for x
    x = 4,636,678,431.02/85,909.23
  6. Step 6: Final answer
    x = 53,971.83

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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.