Home / 78,905.89-118,359.29-26,315.22

Finding the Fourth Proportional to 78,905.89, 118,359.29 and 26,315.22

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Solution

The fourth proportional to 78,905.89, 118,359.29 and 26,315.22 is: 39,472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,905.89 : 118,359.29 = 26,315.22 : x
  2. Step 2: Convert to fraction form
    78,905.89/118,359.29 = 26,315.22/x
  3. Step 3: Cross multiply
    78,905.89x = 118,359.29 × 26,315.22
  4. Step 4: Simplify right side
    78,905.89x = 3,114,650,623.82
  5. Step 5: Solve for x
    x = 3,114,650,623.82/78,905.89
  6. Step 6: Final answer
    x = 39,472.98

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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.