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Finding the Fourth Proportional to 121,752.92, 168,068.72 and 104,688.65

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Solution

The fourth proportional to 121,752.92, 168,068.72 and 104,688.65 is: 144,513.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,752.92 : 168,068.72 = 104,688.65 : x
  2. Step 2: Convert to fraction form
    121,752.92/168,068.72 = 104,688.65/x
  3. Step 3: Cross multiply
    121,752.92x = 168,068.72 × 104,688.65
  4. Step 4: Simplify right side
    121,752.92x = 17,594,888,085.92
  5. Step 5: Solve for x
    x = 17,594,888,085.92/121,752.92
  6. Step 6: Final answer
    x = 144,513.07

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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.