Home / 81,675.50-112,362.27-78,176.30

Finding the Fourth Proportional to 81,675.50, 112,362.27 and 78,176.30

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Solution

The fourth proportional to 81,675.50, 112,362.27 and 78,176.30 is: 107,548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,675.50 : 112,362.27 = 78,176.30 : x
  2. Step 2: Convert to fraction form
    81,675.50/112,362.27 = 78,176.30/x
  3. Step 3: Cross multiply
    81,675.50x = 112,362.27 × 78,176.30
  4. Step 4: Simplify right side
    81,675.50x = 8,784,066,528.20
  5. Step 5: Solve for x
    x = 8,784,066,528.20/81,675.50
  6. Step 6: Final answer
    x = 107,548.37

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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.