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Finding the Fourth Proportional to 243,639.80, 365,459.70 and 103,380.20

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Solution

The fourth proportional to 243,639.80, 365,459.70 and 103,380.20 is: 155,070.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,639.80 : 365,459.70 = 103,380.20 : x
  2. Step 2: Convert to fraction form
    243,639.80/365,459.70 = 103,380.20/x
  3. Step 3: Cross multiply
    243,639.80x = 365,459.70 × 103,380.20
  4. Step 4: Simplify right side
    243,639.80x = 37,781,296,877.94
  5. Step 5: Solve for x
    x = 37,781,296,877.94/243,639.80
  6. Step 6: Final answer
    x = 155,070.30

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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.