Home / 201,931.52-278,678.66-115,918.36

Finding the Fourth Proportional to 201,931.52, 278,678.66 and 115,918.36

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Solution

The fourth proportional to 201,931.52, 278,678.66 and 115,918.36 is: 159,974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,931.52 : 278,678.66 = 115,918.36 : x
  2. Step 2: Convert to fraction form
    201,931.52/278,678.66 = 115,918.36/x
  3. Step 3: Cross multiply
    201,931.52x = 278,678.66 × 115,918.36
  4. Step 4: Simplify right side
    201,931.52x = 32,303,971,957.91
  5. Step 5: Solve for x
    x = 32,303,971,957.91/201,931.52
  6. Step 6: Final answer
    x = 159,974.89

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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.