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Finding the Fourth Proportional to 104,802.78, 144,646.70 and 61,779.71

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Solution

The fourth proportional to 104,802.78, 144,646.70 and 61,779.71 is: 85,267.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,802.78 : 144,646.70 = 61,779.71 : x
  2. Step 2: Convert to fraction form
    104,802.78/144,646.70 = 61,779.71/x
  3. Step 3: Cross multiply
    104,802.78x = 144,646.70 × 61,779.71
  4. Step 4: Simplify right side
    104,802.78x = 8,936,230,455.22
  5. Step 5: Solve for x
    x = 8,936,230,455.22/104,802.78
  6. Step 6: Final answer
    x = 85,267.11

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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.