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Finding the Fourth Proportional to 85,663.14, 128,420.81 and 41,228.76

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Solution

The fourth proportional to 85,663.14, 128,420.81 and 41,228.76 is: 61,807.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,663.14 : 128,420.81 = 41,228.76 : x
  2. Step 2: Convert to fraction form
    85,663.14/128,420.81 = 41,228.76/x
  3. Step 3: Cross multiply
    85,663.14x = 128,420.81 × 41,228.76
  4. Step 4: Simplify right side
    85,663.14x = 5,294,630,548.35
  5. Step 5: Solve for x
    x = 5,294,630,548.35/85,663.14
  6. Step 6: Final answer
    x = 61,807.57

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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.