Home / 109,047.90-163,596.15-85,428.30

Finding the Fourth Proportional to 109,047.90, 163,596.15 and 85,428.30

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Solution

The fourth proportional to 109,047.90, 163,596.15 and 85,428.30 is: 128,161.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,047.90 : 163,596.15 = 85,428.30 : x
  2. Step 2: Convert to fraction form
    109,047.90/163,596.15 = 85,428.30/x
  3. Step 3: Cross multiply
    109,047.90x = 163,596.15 × 85,428.30
  4. Step 4: Simplify right side
    109,047.90x = 13,975,740,981.05
  5. Step 5: Solve for x
    x = 13,975,740,981.05/109,047.90
  6. Step 6: Final answer
    x = 128,161.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.