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Finding the Fourth Proportional to 78,710.42, 108,579.44 and 49,980.92

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Solution

The fourth proportional to 78,710.42, 108,579.44 and 49,980.92 is: 68,947.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,710.42 : 108,579.44 = 49,980.92 : x
  2. Step 2: Convert to fraction form
    78,710.42/108,579.44 = 49,980.92/x
  3. Step 3: Cross multiply
    78,710.42x = 108,579.44 × 49,980.92
  4. Step 4: Simplify right side
    78,710.42x = 5,426,899,886.34
  5. Step 5: Solve for x
    x = 5,426,899,886.34/78,710.42
  6. Step 6: Final answer
    x = 68,947.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.