Home / 137,987.05-190,437.90-76,739.34

Finding the Fourth Proportional to 137,987.05, 190,437.90 and 76,739.34

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Solution

The fourth proportional to 137,987.05, 190,437.90 and 76,739.34 is: 105,909.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,987.05 : 190,437.90 = 76,739.34 : x
  2. Step 2: Convert to fraction form
    137,987.05/190,437.90 = 76,739.34/x
  3. Step 3: Cross multiply
    137,987.05x = 190,437.90 × 76,739.34
  4. Step 4: Simplify right side
    137,987.05x = 14,614,078,756.99
  5. Step 5: Solve for x
    x = 14,614,078,756.99/137,987.05
  6. Step 6: Final answer
    x = 105,909.06

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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.