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Finding the Fourth Proportional to 121,825.71, 168,140.25 and 70,867.98

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Solution

The fourth proportional to 121,825.71, 168,140.25 and 70,867.98 is: 97,809.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,825.71 : 168,140.25 = 70,867.98 : x
  2. Step 2: Convert to fraction form
    121,825.71/168,140.25 = 70,867.98/x
  3. Step 3: Cross multiply
    121,825.71x = 168,140.25 × 70,867.98
  4. Step 4: Simplify right side
    121,825.71x = 11,915,759,874.20
  5. Step 5: Solve for x
    x = 11,915,759,874.20/121,825.71
  6. Step 6: Final answer
    x = 97,809.89

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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.