Home / 91,779.77-126,420.11-64,876.03

Finding the Fourth Proportional to 91,779.77, 126,420.11 and 64,876.03

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Solution

The fourth proportional to 91,779.77, 126,420.11 and 64,876.03 is: 89,362.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,779.77 : 126,420.11 = 64,876.03 : x
  2. Step 2: Convert to fraction form
    91,779.77/126,420.11 = 64,876.03/x
  3. Step 3: Cross multiply
    91,779.77x = 126,420.11 × 64,876.03
  4. Step 4: Simplify right side
    91,779.77x = 8,201,634,451.82
  5. Step 5: Solve for x
    x = 8,201,634,451.82/91,779.77
  6. Step 6: Final answer
    x = 89,362.11

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1.5x scale

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.