Home / 138,613.21-191,287.31-76,525.63

Finding the Fourth Proportional to 138,613.21, 191,287.31 and 76,525.63

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Solution

The fourth proportional to 138,613.21, 191,287.31 and 76,525.63 is: 105,605.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,613.21 : 191,287.31 = 76,525.63 : x
  2. Step 2: Convert to fraction form
    138,613.21/191,287.31 = 76,525.63/x
  3. Step 3: Cross multiply
    138,613.21x = 191,287.31 × 76,525.63
  4. Step 4: Simplify right side
    138,613.21x = 14,638,381,047.91
  5. Step 5: Solve for x
    x = 14,638,381,047.91/138,613.21
  6. Step 6: Final answer
    x = 105,605.96

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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.