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Finding the Fourth Proportional to 139,557, 210,266.16 and 126,245.48

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Solution

The fourth proportional to 139,557, 210,266.16 and 126,245.48 is: 190,210.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,557 : 210,266.16 = 126,245.48 : x
  2. Step 2: Convert to fraction form
    139,557/210,266.16 = 126,245.48/x
  3. Step 3: Cross multiply
    139,557x = 210,266.16 × 126,245.48
  4. Step 4: Simplify right side
    139,557x = 26,545,152,296.96
  5. Step 5: Solve for x
    x = 26,545,152,296.96/139,557
  6. Step 6: Final answer
    x = 190,210.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.