Home / 121,756.14-168,130.37-76,512.50

Finding the Fourth Proportional to 121,756.14, 168,130.37 and 76,512.50

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Solution

The fourth proportional to 121,756.14, 168,130.37 and 76,512.50 is: 105,654.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,756.14 : 168,130.37 = 76,512.50 : x
  2. Step 2: Convert to fraction form
    121,756.14/168,130.37 = 76,512.50/x
  3. Step 3: Cross multiply
    121,756.14x = 168,130.37 × 76,512.50
  4. Step 4: Simplify right side
    121,756.14x = 12,864,074,934.63
  5. Step 5: Solve for x
    x = 12,864,074,934.63/121,756.14
  6. Step 6: Final answer
    x = 105,654.42

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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.