Home / 72,415.08-99,932.58-42,218.28

Finding the Fourth Proportional to 72,415.08, 99,932.58 and 42,218.28

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Solution

The fourth proportional to 72,415.08, 99,932.58 and 42,218.28 is: 58,261.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.08 : 99,932.58 = 42,218.28 : x
  2. Step 2: Convert to fraction form
    72,415.08/99,932.58 = 42,218.28/x
  3. Step 3: Cross multiply
    72,415.08x = 99,932.58 × 42,218.28
  4. Step 4: Simplify right side
    72,415.08x = 4,218,981,643.56
  5. Step 5: Solve for x
    x = 4,218,981,643.56/72,415.08
  6. Step 6: Final answer
    x = 58,261.09

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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.