Home / 118,280.21-163,221-67,288.15

Finding the Fourth Proportional to 118,280.21, 163,221 and 67,288.15

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Solution

The fourth proportional to 118,280.21, 163,221 and 67,288.15 is: 92,854.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,280.21 : 163,221 = 67,288.15 : x
  2. Step 2: Convert to fraction form
    118,280.21/163,221 = 67,288.15/x
  3. Step 3: Cross multiply
    118,280.21x = 163,221 × 67,288.15
  4. Step 4: Simplify right side
    118,280.21x = 10,982,838,315.05
  5. Step 5: Solve for x
    x = 10,982,838,315.05/118,280.21
  6. Step 6: Final answer
    x = 92,854.40

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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.