Home / 121,587.30-167,786.10-76,289.67

Finding the Fourth Proportional to 121,587.30, 167,786.10 and 76,289.67

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Solution

The fourth proportional to 121,587.30, 167,786.10 and 76,289.67 is: 105,277.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.30 : 167,786.10 = 76,289.67 : x
  2. Step 2: Convert to fraction form
    121,587.30/167,786.10 = 76,289.67/x
  3. Step 3: Cross multiply
    121,587.30x = 167,786.10 × 76,289.67
  4. Step 4: Simplify right side
    121,587.30x = 12,800,346,199.59
  5. Step 5: Solve for x
    x = 12,800,346,199.59/121,587.30
  6. Step 6: Final answer
    x = 105,277.00

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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.