Home / 81,439.86-112,390.08-45,628.64

Finding the Fourth Proportional to 81,439.86, 112,390.08 and 45,628.64

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Solution

The fourth proportional to 81,439.86, 112,390.08 and 45,628.64 is: 62,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,439.86 : 112,390.08 = 45,628.64 : x
  2. Step 2: Convert to fraction form
    81,439.86/112,390.08 = 45,628.64/x
  3. Step 3: Cross multiply
    81,439.86x = 112,390.08 × 45,628.64
  4. Step 4: Simplify right side
    81,439.86x = 5,128,206,761.05
  5. Step 5: Solve for x
    x = 5,128,206,761.05/81,439.86
  6. Step 6: Final answer
    x = 62,969.25

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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.