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Finding the Fourth Proportional to 72,415.37, 99,936.63 and 45,207.59

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Solution

The fourth proportional to 72,415.37, 99,936.63 and 45,207.59 is: 62,388.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.37 : 99,936.63 = 45,207.59 : x
  2. Step 2: Convert to fraction form
    72,415.37/99,936.63 = 45,207.59/x
  3. Step 3: Cross multiply
    72,415.37x = 99,936.63 × 45,207.59
  4. Step 4: Simplify right side
    72,415.37x = 4,517,893,695.34
  5. Step 5: Solve for x
    x = 4,517,893,695.34/72,415.37
  6. Step 6: Final answer
    x = 62,388.60

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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.