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Finding the Fourth Proportional to 183,779.80, 275,669.70 and 78,609.40

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Solution

The fourth proportional to 183,779.80, 275,669.70 and 78,609.40 is: 117,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,779.80 : 275,669.70 = 78,609.40 : x
  2. Step 2: Convert to fraction form
    183,779.80/275,669.70 = 78,609.40/x
  3. Step 3: Cross multiply
    183,779.80x = 275,669.70 × 78,609.40
  4. Step 4: Simplify right side
    183,779.80x = 21,670,229,715.18
  5. Step 5: Solve for x
    x = 21,670,229,715.18/183,779.80
  6. Step 6: Final answer
    x = 117,914.10

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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.