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Finding the Fourth Proportional to 153,636.54, 211,856.76 and 121,317.54

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Solution

The fourth proportional to 153,636.54, 211,856.76 and 121,317.54 is: 167,290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,636.54 : 211,856.76 = 121,317.54 : x
  2. Step 2: Convert to fraction form
    153,636.54/211,856.76 = 121,317.54/x
  3. Step 3: Cross multiply
    153,636.54x = 211,856.76 × 121,317.54
  4. Step 4: Simplify right side
    153,636.54x = 25,701,940,955.57
  5. Step 5: Solve for x
    x = 25,701,940,955.57/153,636.54
  6. Step 6: Final answer
    x = 167,290.55

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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.