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Finding the Fourth Proportional to 162,378.70, 243,308.85 and 135,940.30

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Solution

The fourth proportional to 162,378.70, 243,308.85 and 135,940.30 is: 203,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,378.70 : 243,308.85 = 135,940.30 : x
  2. Step 2: Convert to fraction form
    162,378.70/243,308.85 = 135,940.30/x
  3. Step 3: Cross multiply
    162,378.70x = 243,308.85 × 135,940.30
  4. Step 4: Simplify right side
    162,378.70x = 33,075,478,061.66
  5. Step 5: Solve for x
    x = 33,075,478,061.66/162,378.70
  6. Step 6: Final answer
    x = 203,693.45

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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.