Home / 77,987.20-107,621.99-42,177.24

Finding the Fourth Proportional to 77,987.20, 107,621.99 and 42,177.24

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Solution

The fourth proportional to 77,987.20, 107,621.99 and 42,177.24 is: 58,204.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,987.20 : 107,621.99 = 42,177.24 : x
  2. Step 2: Convert to fraction form
    77,987.20/107,621.99 = 42,177.24/x
  3. Step 3: Cross multiply
    77,987.20x = 107,621.99 × 42,177.24
  4. Step 4: Simplify right side
    77,987.20x = 4,539,197,752.51
  5. Step 5: Solve for x
    x = 4,539,197,752.51/77,987.20
  6. Step 6: Final answer
    x = 58,204.39

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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.