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Finding the Fourth Proportional to 122,187.51, 168,620.81 and 68,484.51

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Solution

The fourth proportional to 122,187.51, 168,620.81 and 68,484.51 is: 94,509.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,187.51 : 168,620.81 = 68,484.51 : x
  2. Step 2: Convert to fraction form
    122,187.51/168,620.81 = 68,484.51/x
  3. Step 3: Cross multiply
    122,187.51x = 168,620.81 × 68,484.51
  4. Step 4: Simplify right side
    122,187.51x = 11,547,913,206.23
  5. Step 5: Solve for x
    x = 11,547,913,206.23/122,187.51
  6. Step 6: Final answer
    x = 94,509.77

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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.