Home / 100,926.33-139,278.47-54,985.75

Finding the Fourth Proportional to 100,926.33, 139,278.47 and 54,985.75

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Solution

The fourth proportional to 100,926.33, 139,278.47 and 54,985.75 is: 75,880.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,926.33 : 139,278.47 = 54,985.75 : x
  2. Step 2: Convert to fraction form
    100,926.33/139,278.47 = 54,985.75/x
  3. Step 3: Cross multiply
    100,926.33x = 139,278.47 × 54,985.75
  4. Step 4: Simplify right side
    100,926.33x = 7,658,330,921.07
  5. Step 5: Solve for x
    x = 7,658,330,921.07/100,926.33
  6. Step 6: Final answer
    x = 75,880.40

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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.