Home / 121,909.32-168,268.67-70,931.90

Finding the Fourth Proportional to 121,909.32, 168,268.67 and 70,931.90

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Solution

The fourth proportional to 121,909.32, 168,268.67 and 70,931.90 is: 97,905.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,909.32 : 168,268.67 = 70,931.90 : x
  2. Step 2: Convert to fraction form
    121,909.32/168,268.67 = 70,931.90/x
  3. Step 3: Cross multiply
    121,909.32x = 168,268.67 × 70,931.90
  4. Step 4: Simplify right side
    121,909.32x = 11,935,616,473.57
  5. Step 5: Solve for x
    x = 11,935,616,473.57/121,909.32
  6. Step 6: Final answer
    x = 97,905.69

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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.