Home / 138,421.68-191,036.88-84,742.80

Finding the Fourth Proportional to 138,421.68, 191,036.88 and 84,742.80

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Solution

The fourth proportional to 138,421.68, 191,036.88 and 84,742.80 is: 116,954.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,421.68 : 191,036.88 = 84,742.80 : x
  2. Step 2: Convert to fraction form
    138,421.68/191,036.88 = 84,742.80/x
  3. Step 3: Cross multiply
    138,421.68x = 191,036.88 × 84,742.80
  4. Step 4: Simplify right side
    138,421.68x = 16,189,000,114.46
  5. Step 5: Solve for x
    x = 16,189,000,114.46/138,421.68
  6. Step 6: Final answer
    x = 116,954.22

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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.