Home / 78,787.35-118,188.36-31,391.01

Finding the Fourth Proportional to 78,787.35, 118,188.36 and 31,391.01

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Solution

The fourth proportional to 78,787.35, 118,188.36 and 31,391.01 is: 47,089.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.35 : 118,188.36 = 31,391.01 : x
  2. Step 2: Convert to fraction form
    78,787.35/118,188.36 = 31,391.01/x
  3. Step 3: Cross multiply
    78,787.35x = 118,188.36 × 31,391.01
  4. Step 4: Simplify right side
    78,787.35x = 3,710,051,990.64
  5. Step 5: Solve for x
    x = 3,710,051,990.64/78,787.35
  6. Step 6: Final answer
    x = 47,089.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.