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Finding the Fourth Proportional to 109,779.78, 151,495.74 and 59,478.78

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Solution

The fourth proportional to 109,779.78, 151,495.74 and 59,478.78 is: 82,080.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,779.78 : 151,495.74 = 59,478.78 : x
  2. Step 2: Convert to fraction form
    109,779.78/151,495.74 = 59,478.78/x
  3. Step 3: Cross multiply
    109,779.78x = 151,495.74 × 59,478.78
  4. Step 4: Simplify right side
    109,779.78x = 9,010,781,790.40
  5. Step 5: Solve for x
    x = 9,010,781,790.40/109,779.78
  6. Step 6: Final answer
    x = 82,080.52

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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.