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Finding the Fourth Proportional to 78,518.55, 117,733.06 and 53,588.78

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Solution

The fourth proportional to 78,518.55, 117,733.06 and 53,588.78 is: 80,352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,518.55 : 117,733.06 = 53,588.78 : x
  2. Step 2: Convert to fraction form
    78,518.55/117,733.06 = 53,588.78/x
  3. Step 3: Cross multiply
    78,518.55x = 117,733.06 × 53,588.78
  4. Step 4: Simplify right side
    78,518.55x = 6,309,171,051.07
  5. Step 5: Solve for x
    x = 6,309,171,051.07/78,518.55
  6. Step 6: Final answer
    x = 80,352.62

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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.