Home / 138,055.32-190,515.60-77,626.08

Finding the Fourth Proportional to 138,055.32, 190,515.60 and 77,626.08

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Solution

The fourth proportional to 138,055.32, 190,515.60 and 77,626.08 is: 107,123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,055.32 : 190,515.60 = 77,626.08 : x
  2. Step 2: Convert to fraction form
    138,055.32/190,515.60 = 77,626.08/x
  3. Step 3: Cross multiply
    138,055.32x = 190,515.60 × 77,626.08
  4. Step 4: Simplify right side
    138,055.32x = 14,788,979,206.85
  5. Step 5: Solve for x
    x = 14,788,979,206.85/138,055.32
  6. Step 6: Final answer
    x = 107,123.57

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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.