Home / 100,630.07-138,870.94-55,312.25

Finding the Fourth Proportional to 100,630.07, 138,870.94 and 55,312.25

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Solution

The fourth proportional to 100,630.07, 138,870.94 and 55,312.25 is: 76,331.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,630.07 : 138,870.94 = 55,312.25 : x
  2. Step 2: Convert to fraction form
    100,630.07/138,870.94 = 55,312.25/x
  3. Step 3: Cross multiply
    100,630.07x = 138,870.94 × 55,312.25
  4. Step 4: Simplify right side
    100,630.07x = 7,681,263,318.38
  5. Step 5: Solve for x
    x = 7,681,263,318.38/100,630.07
  6. Step 6: Final answer
    x = 76,331.69

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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.