Home / 81,779.10-122,668.65-70,115.10

Finding the Fourth Proportional to 81,779.10, 122,668.65 and 70,115.10

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Solution

The fourth proportional to 81,779.10, 122,668.65 and 70,115.10 is: 105,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,779.10 : 122,668.65 = 70,115.10 : x
  2. Step 2: Convert to fraction form
    81,779.10/122,668.65 = 70,115.10/x
  3. Step 3: Cross multiply
    81,779.10x = 122,668.65 × 70,115.10
  4. Step 4: Simplify right side
    81,779.10x = 8,600,924,661.62
  5. Step 5: Solve for x
    x = 8,600,924,661.62/81,779.10
  6. Step 6: Final answer
    x = 105,172.65

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1.5x scale

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.