Home / 138,111.23-190,591.59-77,681.84

Finding the Fourth Proportional to 138,111.23, 190,591.59 and 77,681.84

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Solution

The fourth proportional to 138,111.23, 190,591.59 and 77,681.84 is: 107,199.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,111.23 : 190,591.59 = 77,681.84 : x
  2. Step 2: Convert to fraction form
    138,111.23/190,591.59 = 77,681.84/x
  3. Step 3: Cross multiply
    138,111.23x = 190,591.59 × 77,681.84
  4. Step 4: Simplify right side
    138,111.23x = 14,805,504,446.77
  5. Step 5: Solve for x
    x = 14,805,504,446.77/138,111.23
  6. Step 6: Final answer
    x = 107,199.86

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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.