Home / 81,412.30-121,908.13-56,189.67

Finding the Fourth Proportional to 81,412.30, 121,908.13 and 56,189.67

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Solution

The fourth proportional to 81,412.30, 121,908.13 and 56,189.67 is: 84,139.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,412.30 : 121,908.13 = 56,189.67 : x
  2. Step 2: Convert to fraction form
    81,412.30/121,908.13 = 56,189.67/x
  3. Step 3: Cross multiply
    81,412.30x = 121,908.13 × 56,189.67
  4. Step 4: Simplify right side
    81,412.30x = 6,849,977,595.02
  5. Step 5: Solve for x
    x = 6,849,977,595.02/81,412.30
  6. Step 6: Final answer
    x = 84,139.34

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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.