Home / 76,485.50-105,175.65-66,396.30

Finding the Fourth Proportional to 76,485.50, 105,175.65 and 66,396.30

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Solution

The fourth proportional to 76,485.50, 105,175.65 and 66,396.30 is: 91,301.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,485.50 : 105,175.65 = 66,396.30 : x
  2. Step 2: Convert to fraction form
    76,485.50/105,175.65 = 66,396.30/x
  3. Step 3: Cross multiply
    76,485.50x = 105,175.65 × 66,396.30
  4. Step 4: Simplify right side
    76,485.50x = 6,983,273,678.11
  5. Step 5: Solve for x
    x = 6,983,273,678.11/76,485.50
  6. Step 6: Final answer
    x = 91,301.93

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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.