Home / 85,776.23-118,416-66,613.01

Finding the Fourth Proportional to 85,776.23, 118,416 and 66,613.01

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Solution

The fourth proportional to 85,776.23, 118,416 and 66,613.01 is: 91,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,776.23 : 118,416 = 66,613.01 : x
  2. Step 2: Convert to fraction form
    85,776.23/118,416 = 66,613.01/x
  3. Step 3: Cross multiply
    85,776.23x = 118,416 × 66,613.01
  4. Step 4: Simplify right side
    85,776.23x = 7,888,045,600.08
  5. Step 5: Solve for x
    x = 7,888,045,600.08/85,776.23
  6. Step 6: Final answer
    x = 91,960.75

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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.