Home / 138,217.08-190,739.39-77,788.16

Finding the Fourth Proportional to 138,217.08, 190,739.39 and 77,788.16

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Solution

The fourth proportional to 138,217.08, 190,739.39 and 77,788.16 is: 107,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,217.08 : 190,739.39 = 77,788.16 : x
  2. Step 2: Convert to fraction form
    138,217.08/190,739.39 = 77,788.16/x
  3. Step 3: Cross multiply
    138,217.08x = 190,739.39 × 77,788.16
  4. Step 4: Simplify right side
    138,217.08x = 14,837,264,844.98
  5. Step 5: Solve for x
    x = 14,837,264,844.98/138,217.08
  6. Step 6: Final answer
    x = 107,347.55

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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.