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Finding the Fourth Proportional to 70,387.63, 105,580.59 and 28,266.94

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Solution

The fourth proportional to 70,387.63, 105,580.59 and 28,266.94 is: 42,400.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,387.63 : 105,580.59 = 28,266.94 : x
  2. Step 2: Convert to fraction form
    70,387.63/105,580.59 = 28,266.94/x
  3. Step 3: Cross multiply
    70,387.63x = 105,580.59 × 28,266.94
  4. Step 4: Simplify right side
    70,387.63x = 2,984,440,202.69
  5. Step 5: Solve for x
    x = 2,984,440,202.69/70,387.63
  6. Step 6: Final answer
    x = 42,400.07

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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.