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Finding the Fourth Proportional to 145,361.40, 218,042.10 and 78,833.40

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Solution

The fourth proportional to 145,361.40, 218,042.10 and 78,833.40 is: 118,250.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,361.40 : 218,042.10 = 78,833.40 : x
  2. Step 2: Convert to fraction form
    145,361.40/218,042.10 = 78,833.40/x
  3. Step 3: Cross multiply
    145,361.40x = 218,042.10 × 78,833.40
  4. Step 4: Simplify right side
    145,361.40x = 17,189,000,086.14
  5. Step 5: Solve for x
    x = 17,189,000,086.14/145,361.40
  6. Step 6: Final answer
    x = 118,250.10

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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.