Home / 121,281-181,699.84-87,918.32

Finding the Fourth Proportional to 121,281, 181,699.84 and 87,918.32

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Solution

The fourth proportional to 121,281, 181,699.84 and 87,918.32 is: 131,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,281 : 181,699.84 = 87,918.32 : x
  2. Step 2: Convert to fraction form
    121,281/181,699.84 = 87,918.32/x
  3. Step 3: Cross multiply
    121,281x = 181,699.84 × 87,918.32
  4. Step 4: Simplify right side
    121,281x = 15,974,744,677.07
  5. Step 5: Solve for x
    x = 15,974,744,677.07/121,281
  6. Step 6: Final answer
    x = 131,716.80

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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.