Home / 78,787.45-108,726.30-42,977.15

Finding the Fourth Proportional to 78,787.45, 108,726.30 and 42,977.15

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Solution

The fourth proportional to 78,787.45, 108,726.30 and 42,977.15 is: 59,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.45 : 108,726.30 = 42,977.15 : x
  2. Step 2: Convert to fraction form
    78,787.45/108,726.30 = 42,977.15/x
  3. Step 3: Cross multiply
    78,787.45x = 108,726.30 × 42,977.15
  4. Step 4: Simplify right side
    78,787.45x = 4,672,746,368.14
  5. Step 5: Solve for x
    x = 4,672,746,368.14/78,787.45
  6. Step 6: Final answer
    x = 59,308.26

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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.