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Finding the Fourth Proportional to 85,663.40, 128,421.18 and 41,229.02

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Solution

The fourth proportional to 85,663.40, 128,421.18 and 41,229.02 is: 61,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,663.40 : 128,421.18 = 41,229.02 : x
  2. Step 2: Convert to fraction form
    85,663.40/128,421.18 = 41,229.02/x
  3. Step 3: Cross multiply
    85,663.40x = 128,421.18 × 41,229.02
  4. Step 4: Simplify right side
    85,663.40x = 5,294,679,398.64
  5. Step 5: Solve for x
    x = 5,294,679,398.64/85,663.40
  6. Step 6: Final answer
    x = 61,807.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.