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Finding the Fourth Proportional to 61,659.63, 85,147.74 and 45,384.21

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Solution

The fourth proportional to 61,659.63, 85,147.74 and 45,384.21 is: 62,672.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,659.63 : 85,147.74 = 45,384.21 : x
  2. Step 2: Convert to fraction form
    61,659.63/85,147.74 = 45,384.21/x
  3. Step 3: Cross multiply
    61,659.63x = 85,147.74 × 45,384.21
  4. Step 4: Simplify right side
    61,659.63x = 3,864,362,913.19
  5. Step 5: Solve for x
    x = 3,864,362,913.19/61,659.63
  6. Step 6: Final answer
    x = 62,672.50

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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.