Home / 112,909.64-155,804.04-65,178.36

Finding the Fourth Proportional to 112,909.64, 155,804.04 and 65,178.36

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Solution

The fourth proportional to 112,909.64, 155,804.04 and 65,178.36 is: 89,939.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,909.64 : 155,804.04 = 65,178.36 : x
  2. Step 2: Convert to fraction form
    112,909.64/155,804.04 = 65,178.36/x
  3. Step 3: Cross multiply
    112,909.64x = 155,804.04 × 65,178.36
  4. Step 4: Simplify right side
    112,909.64x = 10,155,051,808.57
  5. Step 5: Solve for x
    x = 10,155,051,808.57/112,909.64
  6. Step 6: Final answer
    x = 89,939.64

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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.