Home / 81,117.06-112,018.50-76,699.32

Finding the Fourth Proportional to 81,117.06, 112,018.50 and 76,699.32

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Solution

The fourth proportional to 81,117.06, 112,018.50 and 76,699.32 is: 105,917.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,117.06 : 112,018.50 = 76,699.32 : x
  2. Step 2: Convert to fraction form
    81,117.06/112,018.50 = 76,699.32/x
  3. Step 3: Cross multiply
    81,117.06x = 112,018.50 × 76,699.32
  4. Step 4: Simplify right side
    81,117.06x = 8,591,742,777.42
  5. Step 5: Solve for x
    x = 8,591,742,777.42/81,117.06
  6. Step 6: Final answer
    x = 105,917.83

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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.