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Finding the Fourth Proportional to 61,712.40, 85,303.08 and 56,813.52

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Solution

The fourth proportional to 61,712.40, 85,303.08 and 56,813.52 is: 78,531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,712.40 : 85,303.08 = 56,813.52 : x
  2. Step 2: Convert to fraction form
    61,712.40/85,303.08 = 56,813.52/x
  3. Step 3: Cross multiply
    61,712.40x = 85,303.08 × 56,813.52
  4. Step 4: Simplify right side
    61,712.40x = 4,846,368,241.64
  5. Step 5: Solve for x
    x = 4,846,368,241.64/61,712.40
  6. Step 6: Final answer
    x = 78,531.51

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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.