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Finding the Fourth Proportional to 139,468.40, 208,895.40 and 121,036.40

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Solution

The fourth proportional to 139,468.40, 208,895.40 and 121,036.40 is: 181,288.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,468.40 : 208,895.40 = 121,036.40 : x
  2. Step 2: Convert to fraction form
    139,468.40/208,895.40 = 121,036.40/x
  3. Step 3: Cross multiply
    139,468.40x = 208,895.40 × 121,036.40
  4. Step 4: Simplify right side
    139,468.40x = 25,283,947,192.56
  5. Step 5: Solve for x
    x = 25,283,947,192.56/139,468.40
  6. Step 6: Final answer
    x = 181,288.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.