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Finding the Fourth Proportional to 56,880.92, 78,495.66 and 31,730.42

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Solution

The fourth proportional to 56,880.92, 78,495.66 and 31,730.42 is: 43,787.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,880.92 : 78,495.66 = 31,730.42 : x
  2. Step 2: Convert to fraction form
    56,880.92/78,495.66 = 31,730.42/x
  3. Step 3: Cross multiply
    56,880.92x = 78,495.66 × 31,730.42
  4. Step 4: Simplify right side
    56,880.92x = 2,490,700,456.22
  5. Step 5: Solve for x
    x = 2,490,700,456.22/56,880.92
  6. Step 6: Final answer
    x = 43,787.98

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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.