Home / 79,688.70-119,533.05-66,858.30

Finding the Fourth Proportional to 79,688.70, 119,533.05 and 66,858.30

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Solution

The fourth proportional to 79,688.70, 119,533.05 and 66,858.30 is: 100,287.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,688.70 : 119,533.05 = 66,858.30 : x
  2. Step 2: Convert to fraction form
    79,688.70/119,533.05 = 66,858.30/x
  3. Step 3: Cross multiply
    79,688.70x = 119,533.05 × 66,858.30
  4. Step 4: Simplify right side
    79,688.70x = 7,991,776,516.82
  5. Step 5: Solve for x
    x = 7,991,776,516.82/79,688.70
  6. Step 6: Final answer
    x = 100,287.45

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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.