Home / 72,322.20-99,801.70-42,108.40

Finding the Fourth Proportional to 72,322.20, 99,801.70 and 42,108.40

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Solution

The fourth proportional to 72,322.20, 99,801.70 and 42,108.40 is: 58,107.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,322.20 : 99,801.70 = 42,108.40 : x
  2. Step 2: Convert to fraction form
    72,322.20/99,801.70 = 42,108.40/x
  3. Step 3: Cross multiply
    72,322.20x = 99,801.70 × 42,108.40
  4. Step 4: Simplify right side
    72,322.20x = 4,202,489,904.28
  5. Step 5: Solve for x
    x = 4,202,489,904.28/72,322.20
  6. Step 6: Final answer
    x = 58,107.88

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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.