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Finding the Fourth Proportional to 162,082.80, 243,342.90 and 128,840.40

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Solution

The fourth proportional to 162,082.80, 243,342.90 and 128,840.40 is: 193,434.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,082.80 : 243,342.90 = 128,840.40 : x
  2. Step 2: Convert to fraction form
    162,082.80/243,342.90 = 128,840.40/x
  3. Step 3: Cross multiply
    162,082.80x = 243,342.90 × 128,840.40
  4. Step 4: Simplify right side
    162,082.80x = 31,352,396,573.16
  5. Step 5: Solve for x
    x = 31,352,396,573.16/162,082.80
  6. Step 6: Final answer
    x = 193,434.45

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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.