Home / 158,345.51-218,516.78-86,725.71

Finding the Fourth Proportional to 158,345.51, 218,516.78 and 86,725.71

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Solution

The fourth proportional to 158,345.51, 218,516.78 and 86,725.71 is: 119,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,345.51 : 218,516.78 = 86,725.71 : x
  2. Step 2: Convert to fraction form
    158,345.51/218,516.78 = 86,725.71/x
  3. Step 3: Cross multiply
    158,345.51x = 218,516.78 × 86,725.71
  4. Step 4: Simplify right side
    158,345.51x = 18,951,023,109.23
  5. Step 5: Solve for x
    x = 18,951,023,109.23/158,345.51
  6. Step 6: Final answer
    x = 119,681.47

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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.