Home / 66,135.60-91,270.28-40,643.03

Finding the Fourth Proportional to 66,135.60, 91,270.28 and 40,643.03

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Solution

The fourth proportional to 66,135.60, 91,270.28 and 40,643.03 is: 56,089.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,135.60 : 91,270.28 = 40,643.03 : x
  2. Step 2: Convert to fraction form
    66,135.60/91,270.28 = 40,643.03/x
  3. Step 3: Cross multiply
    66,135.60x = 91,270.28 × 40,643.03
  4. Step 4: Simplify right side
    66,135.60x = 3,709,501,057.93
  5. Step 5: Solve for x
    x = 3,709,501,057.93/66,135.60
  6. Step 6: Final answer
    x = 56,089.32

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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.