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Finding the Fourth Proportional to 139,790.80, 209,904.90 and 106,548.40

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Solution

The fourth proportional to 139,790.80, 209,904.90 and 106,548.40 is: 159,989.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,790.80 : 209,904.90 = 106,548.40 : x
  2. Step 2: Convert to fraction form
    139,790.80/209,904.90 = 106,548.40/x
  3. Step 3: Cross multiply
    139,790.80x = 209,904.90 × 106,548.40
  4. Step 4: Simplify right side
    139,790.80x = 22,365,031,247.16
  5. Step 5: Solve for x
    x = 22,365,031,247.16/139,790.80
  6. Step 6: Final answer
    x = 159,989.29

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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.