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Finding the Fourth Proportional to 66,445, 91,716.31 and 39,595.93

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Solution

The fourth proportional to 66,445, 91,716.31 and 39,595.93 is: 54,655.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,445 : 91,716.31 = 39,595.93 : x
  2. Step 2: Convert to fraction form
    66,445/91,716.31 = 39,595.93/x
  3. Step 3: Cross multiply
    66,445x = 91,716.31 × 39,595.93
  4. Step 4: Simplify right side
    66,445x = 3,631,592,590.62
  5. Step 5: Solve for x
    x = 3,631,592,590.62/66,445
  6. Step 6: Final answer
    x = 54,655.62

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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.