Home / 78,972.08-109,071.99-57,557.30

Finding the Fourth Proportional to 78,972.08, 109,071.99 and 57,557.30

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Solution

The fourth proportional to 78,972.08, 109,071.99 and 57,557.30 is: 79,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,972.08 : 109,071.99 = 57,557.30 : x
  2. Step 2: Convert to fraction form
    78,972.08/109,071.99 = 57,557.30/x
  3. Step 3: Cross multiply
    78,972.08x = 109,071.99 × 57,557.30
  4. Step 4: Simplify right side
    78,972.08x = 6,277,888,704.67
  5. Step 5: Solve for x
    x = 6,277,888,704.67/78,972.08
  6. Step 6: Final answer
    x = 79,495.05

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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.