Home / 78,787.64-108,725.67-42,976.87

Finding the Fourth Proportional to 78,787.64, 108,725.67 and 42,976.87

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Solution

The fourth proportional to 78,787.64, 108,725.67 and 42,976.87 is: 59,307.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.64 : 108,725.67 = 42,976.87 : x
  2. Step 2: Convert to fraction form
    78,787.64/108,725.67 = 42,976.87/x
  3. Step 3: Cross multiply
    78,787.64x = 108,725.67 × 42,976.87
  4. Step 4: Simplify right side
    78,787.64x = 4,672,688,713.44
  5. Step 5: Solve for x
    x = 4,672,688,713.44/78,787.64
  6. Step 6: Final answer
    x = 59,307.38

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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.