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Finding the Fourth Proportional to 139,985.67, 209,979.30 and 34,804.65

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Solution

The fourth proportional to 139,985.67, 209,979.30 and 34,804.65 is: 52,207.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,985.67 : 209,979.30 = 34,804.65 : x
  2. Step 2: Convert to fraction form
    139,985.67/209,979.30 = 34,804.65/x
  3. Step 3: Cross multiply
    139,985.67x = 209,979.30 × 34,804.65
  4. Step 4: Simplify right side
    139,985.67x = 7,308,256,043.75
  5. Step 5: Solve for x
    x = 7,308,256,043.75/139,985.67
  6. Step 6: Final answer
    x = 52,207.17

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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.