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Finding the Fourth Proportional to 78,059.48, 117,089.52 and 18,895.05

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Solution

The fourth proportional to 78,059.48, 117,089.52 and 18,895.05 is: 28,342.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,059.48 : 117,089.52 = 18,895.05 : x
  2. Step 2: Convert to fraction form
    78,059.48/117,089.52 = 18,895.05/x
  3. Step 3: Cross multiply
    78,059.48x = 117,089.52 × 18,895.05
  4. Step 4: Simplify right side
    78,059.48x = 2,212,412,334.88
  5. Step 5: Solve for x
    x = 2,212,412,334.88/78,059.48
  6. Step 6: Final answer
    x = 28,342.65

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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.