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Finding the Fourth Proportional to 154,818.51, 213,632.46 and 86,821.49

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Solution

The fourth proportional to 154,818.51, 213,632.46 and 86,821.49 is: 119,804.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,818.51 : 213,632.46 = 86,821.49 : x
  2. Step 2: Convert to fraction form
    154,818.51/213,632.46 = 86,821.49/x
  3. Step 3: Cross multiply
    154,818.51x = 213,632.46 × 86,821.49
  4. Step 4: Simplify right side
    154,818.51x = 18,547,886,987.30
  5. Step 5: Solve for x
    x = 18,547,886,987.30/154,818.51
  6. Step 6: Final answer
    x = 119,804.07

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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.