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Finding the Fourth Proportional to 201,699.65, 278,345.51 and 112,275.65

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Solution

The fourth proportional to 201,699.65, 278,345.51 and 112,275.65 is: 154,940.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,699.65 : 278,345.51 = 112,275.65 : x
  2. Step 2: Convert to fraction form
    201,699.65/278,345.51 = 112,275.65/x
  3. Step 3: Cross multiply
    201,699.65x = 278,345.51 × 112,275.65
  4. Step 4: Simplify right side
    201,699.65x = 31,251,423,059.83
  5. Step 5: Solve for x
    x = 31,251,423,059.83/201,699.65
  6. Step 6: Final answer
    x = 154,940.39

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1.5x scale

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.