Home / 209,945.18-289,637.12-123,870

Finding the Fourth Proportional to 209,945.18, 289,637.12 and 123,870

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Solution

The fourth proportional to 209,945.18, 289,637.12 and 123,870 is: 170,889.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,945.18 : 289,637.12 = 123,870 : x
  2. Step 2: Convert to fraction form
    209,945.18/289,637.12 = 123,870/x
  3. Step 3: Cross multiply
    209,945.18x = 289,637.12 × 123,870
  4. Step 4: Simplify right side
    209,945.18x = 35,877,350,054.40
  5. Step 5: Solve for x
    x = 35,877,350,054.40/209,945.18
  6. Step 6: Final answer
    x = 170,889.13

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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.