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Finding the Fourth Proportional to 72,805.70, 100,415.64 and 63,838.16

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Solution

The fourth proportional to 72,805.70, 100,415.64 and 63,838.16 is: 88,047.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.70 : 100,415.64 = 63,838.16 : x
  2. Step 2: Convert to fraction form
    72,805.70/100,415.64 = 63,838.16/x
  3. Step 3: Cross multiply
    72,805.70x = 100,415.64 × 63,838.16
  4. Step 4: Simplify right side
    72,805.70x = 6,410,349,692.82
  5. Step 5: Solve for x
    x = 6,410,349,692.82/72,805.70
  6. Step 6: Final answer
    x = 88,047.36

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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.