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Finding the Fourth Proportional to 66,421.91, 91,658.89 and 37,737.81

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Solution

The fourth proportional to 66,421.91, 91,658.89 and 37,737.81 is: 52,076.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,421.91 : 91,658.89 = 37,737.81 : x
  2. Step 2: Convert to fraction form
    66,421.91/91,658.89 = 37,737.81/x
  3. Step 3: Cross multiply
    66,421.91x = 91,658.89 × 37,737.81
  4. Step 4: Simplify right side
    66,421.91x = 3,459,005,775.63
  5. Step 5: Solve for x
    x = 3,459,005,775.63/66,421.91
  6. Step 6: Final answer
    x = 52,076.28

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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.