Home / 112,509.90-155,190.50-72,159.75

Finding the Fourth Proportional to 112,509.90, 155,190.50 and 72,159.75

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Solution

The fourth proportional to 112,509.90, 155,190.50 and 72,159.75 is: 99,533.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,509.90 : 155,190.50 = 72,159.75 : x
  2. Step 2: Convert to fraction form
    112,509.90/155,190.50 = 72,159.75/x
  3. Step 3: Cross multiply
    112,509.90x = 155,190.50 × 72,159.75
  4. Step 4: Simplify right side
    112,509.90x = 11,198,507,474.80
  5. Step 5: Solve for x
    x = 11,198,507,474.80/112,509.90
  6. Step 6: Final answer
    x = 99,533.53

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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.