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Finding the Fourth Proportional to 158,316.10, 218,468.68 and 86,696.51

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Solution

The fourth proportional to 158,316.10, 218,468.68 and 86,696.51 is: 119,637.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,316.10 : 218,468.68 = 86,696.51 : x
  2. Step 2: Convert to fraction form
    158,316.10/218,468.68 = 86,696.51/x
  3. Step 3: Cross multiply
    158,316.10x = 218,468.68 × 86,696.51
  4. Step 4: Simplify right side
    158,316.10x = 18,940,470,791.22
  5. Step 5: Solve for x
    x = 18,940,470,791.22/158,316.10
  6. Step 6: Final answer
    x = 119,637.05

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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.