Home / 111,530.18-153,861.39-66,210.08

Finding the Fourth Proportional to 111,530.18, 153,861.39 and 66,210.08

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Solution

The fourth proportional to 111,530.18, 153,861.39 and 66,210.08 is: 91,340.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,530.18 : 153,861.39 = 66,210.08 : x
  2. Step 2: Convert to fraction form
    111,530.18/153,861.39 = 66,210.08/x
  3. Step 3: Cross multiply
    111,530.18x = 153,861.39 × 66,210.08
  4. Step 4: Simplify right side
    111,530.18x = 10,187,174,171.50
  5. Step 5: Solve for x
    x = 10,187,174,171.50/111,530.18
  6. Step 6: Final answer
    x = 91,340.07

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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.