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Finding the Fourth Proportional to 78,803.92, 108,749.40 and 50,509.64

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Solution

The fourth proportional to 78,803.92, 108,749.40 and 50,509.64 is: 69,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,803.92 : 108,749.40 = 50,509.64 : x
  2. Step 2: Convert to fraction form
    78,803.92/108,749.40 = 50,509.64/x
  3. Step 3: Cross multiply
    78,803.92x = 108,749.40 × 50,509.64
  4. Step 4: Simplify right side
    78,803.92x = 5,492,893,044.22
  5. Step 5: Solve for x
    x = 5,492,893,044.22/78,803.92
  6. Step 6: Final answer
    x = 69,703.30

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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.