Home / 66,683.36-91,979.68-42,772.16

Finding the Fourth Proportional to 66,683.36, 91,979.68 and 42,772.16

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Solution

The fourth proportional to 66,683.36, 91,979.68 and 42,772.16 is: 58,997.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,683.36 : 91,979.68 = 42,772.16 : x
  2. Step 2: Convert to fraction form
    66,683.36/91,979.68 = 42,772.16/x
  3. Step 3: Cross multiply
    66,683.36x = 91,979.68 × 42,772.16
  4. Step 4: Simplify right side
    66,683.36x = 3,934,169,589.71
  5. Step 5: Solve for x
    x = 3,934,169,589.71/66,683.36
  6. Step 6: Final answer
    x = 58,997.77

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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.