Home / 131,820.12-181,910.75-71,390.58

Finding the Fourth Proportional to 131,820.12, 181,910.75 and 71,390.58

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Solution

The fourth proportional to 131,820.12, 181,910.75 and 71,390.58 is: 98,518.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,820.12 : 181,910.75 = 71,390.58 : x
  2. Step 2: Convert to fraction form
    131,820.12/181,910.75 = 71,390.58/x
  3. Step 3: Cross multiply
    131,820.12x = 181,910.75 × 71,390.58
  4. Step 4: Simplify right side
    131,820.12x = 12,986,712,911.62
  5. Step 5: Solve for x
    x = 12,986,712,911.62/131,820.12
  6. Step 6: Final answer
    x = 98,518.44

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1.5x scale

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.