Home / 100,637.84-138,881.79-55,317.74

Finding the Fourth Proportional to 100,637.84, 138,881.79 and 55,317.74

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Solution

The fourth proportional to 100,637.84, 138,881.79 and 55,317.74 is: 76,339.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,637.84 : 138,881.79 = 55,317.74 : x
  2. Step 2: Convert to fraction form
    100,637.84/138,881.79 = 55,317.74/x
  3. Step 3: Cross multiply
    100,637.84x = 138,881.79 × 55,317.74
  4. Step 4: Simplify right side
    100,637.84x = 7,682,626,055.55
  5. Step 5: Solve for x
    x = 7,682,626,055.55/100,637.84
  6. Step 6: Final answer
    x = 76,339.34

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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.