Home / 99,742.35-137,643.74-56,721.82

Finding the Fourth Proportional to 99,742.35, 137,643.74 and 56,721.82

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Solution

The fourth proportional to 99,742.35, 137,643.74 and 56,721.82 is: 78,275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,742.35 : 137,643.74 = 56,721.82 : x
  2. Step 2: Convert to fraction form
    99,742.35/137,643.74 = 56,721.82/x
  3. Step 3: Cross multiply
    99,742.35x = 137,643.74 × 56,721.82
  4. Step 4: Simplify right side
    99,742.35x = 7,807,403,606.54
  5. Step 5: Solve for x
    x = 7,807,403,606.54/99,742.35
  6. Step 6: Final answer
    x = 78,275.71

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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.