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Finding the Fourth Proportional to 121,909.34, 168,268.70 and 70,931.92

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Solution

The fourth proportional to 121,909.34, 168,268.70 and 70,931.92 is: 97,905.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,909.34 : 168,268.70 = 70,931.92 : x
  2. Step 2: Convert to fraction form
    121,909.34/168,268.70 = 70,931.92/x
  3. Step 3: Cross multiply
    121,909.34x = 168,268.70 × 70,931.92
  4. Step 4: Simplify right side
    121,909.34x = 11,935,622,039.07
  5. Step 5: Solve for x
    x = 11,935,622,039.07/121,909.34
  6. Step 6: Final answer
    x = 97,905.72

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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.