Home / 81,121.08-112,024.04-76,703.32

Finding the Fourth Proportional to 81,121.08, 112,024.04 and 76,703.32

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Solution

The fourth proportional to 81,121.08, 112,024.04 and 76,703.32 is: 105,923.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.08 : 112,024.04 = 76,703.32 : x
  2. Step 2: Convert to fraction form
    81,121.08/112,024.04 = 76,703.32/x
  3. Step 3: Cross multiply
    81,121.08x = 112,024.04 × 76,703.32
  4. Step 4: Simplify right side
    81,121.08x = 8,592,615,787.81
  5. Step 5: Solve for x
    x = 8,592,615,787.81/81,121.08
  6. Step 6: Final answer
    x = 105,923.34

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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.