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Finding the Fourth Proportional to 78,652.88, 108,533.96 and 45,116.88

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Solution

The fourth proportional to 78,652.88, 108,533.96 and 45,116.88 is: 62,257.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,652.88 : 108,533.96 = 45,116.88 : x
  2. Step 2: Convert to fraction form
    78,652.88/108,533.96 = 45,116.88/x
  3. Step 3: Cross multiply
    78,652.88x = 108,533.96 × 45,116.88
  4. Step 4: Simplify right side
    78,652.88x = 4,896,713,649.24
  5. Step 5: Solve for x
    x = 4,896,713,649.24/78,652.88
  6. Step 6: Final answer
    x = 62,257.27

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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.