Home / 138,741.51-191,442.76-81,359.18

Finding the Fourth Proportional to 138,741.51, 191,442.76 and 81,359.18

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Solution

The fourth proportional to 138,741.51, 191,442.76 and 81,359.18 is: 112,263.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,741.51 : 191,442.76 = 81,359.18 : x
  2. Step 2: Convert to fraction form
    138,741.51/191,442.76 = 81,359.18/x
  3. Step 3: Cross multiply
    138,741.51x = 191,442.76 × 81,359.18
  4. Step 4: Simplify right side
    138,741.51x = 15,575,626,245.75
  5. Step 5: Solve for x
    x = 15,575,626,245.75/138,741.51
  6. Step 6: Final answer
    x = 112,263.64

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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.