Home / 88,390.12-121,980.20-48,106.12

Finding the Fourth Proportional to 88,390.12, 121,980.20 and 48,106.12

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Solution

The fourth proportional to 88,390.12, 121,980.20 and 48,106.12 is: 66,387.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,390.12 : 121,980.20 = 48,106.12 : x
  2. Step 2: Convert to fraction form
    88,390.12/121,980.20 = 48,106.12/x
  3. Step 3: Cross multiply
    88,390.12x = 121,980.20 × 48,106.12
  4. Step 4: Simplify right side
    88,390.12x = 5,867,994,138.82
  5. Step 5: Solve for x
    x = 5,867,994,138.82/88,390.12
  6. Step 6: Final answer
    x = 66,387.44

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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.