Home / 66,142.64-91,291.28-40,670.92

Finding the Fourth Proportional to 66,142.64, 91,291.28 and 40,670.92

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Solution

The fourth proportional to 66,142.64, 91,291.28 and 40,670.92 is: 56,134.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,142.64 : 91,291.28 = 40,670.92 : x
  2. Step 2: Convert to fraction form
    66,142.64/91,291.28 = 40,670.92/x
  3. Step 3: Cross multiply
    66,142.64x = 91,291.28 × 40,670.92
  4. Step 4: Simplify right side
    66,142.64x = 3,712,900,345.58
  5. Step 5: Solve for x
    x = 3,712,900,345.58/66,142.64
  6. Step 6: Final answer
    x = 56,134.75

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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.