Home / 66,688.74-91,987.10-42,777.54

Finding the Fourth Proportional to 66,688.74, 91,987.10 and 42,777.54

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Solution

The fourth proportional to 66,688.74, 91,987.10 and 42,777.54 is: 59,005.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,688.74 : 91,987.10 = 42,777.54 : x
  2. Step 2: Convert to fraction form
    66,688.74/91,987.10 = 42,777.54/x
  3. Step 3: Cross multiply
    66,688.74x = 91,987.10 × 42,777.54
  4. Step 4: Simplify right side
    66,688.74x = 3,934,981,849.73
  5. Step 5: Solve for x
    x = 3,934,981,849.73/66,688.74
  6. Step 6: Final answer
    x = 59,005.19

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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.