Home / 66,638.08-91,960.64-38,343.20

Finding the Fourth Proportional to 66,638.08, 91,960.64 and 38,343.20

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Solution

The fourth proportional to 66,638.08, 91,960.64 and 38,343.20 is: 52,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.08 : 91,960.64 = 38,343.20 : x
  2. Step 2: Convert to fraction form
    66,638.08/91,960.64 = 38,343.20/x
  3. Step 3: Cross multiply
    66,638.08x = 91,960.64 × 38,343.20
  4. Step 4: Simplify right side
    66,638.08x = 3,526,065,211.65
  5. Step 5: Solve for x
    x = 3,526,065,211.65/66,638.08
  6. Step 6: Final answer
    x = 52,913.67

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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.