Home / 189,555.90-261,587.68-103,515.67

Finding the Fourth Proportional to 189,555.90, 261,587.68 and 103,515.67

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Solution

The fourth proportional to 189,555.90, 261,587.68 and 103,515.67 is: 142,851.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,555.90 : 261,587.68 = 103,515.67 : x
  2. Step 2: Convert to fraction form
    189,555.90/261,587.68 = 103,515.67/x
  3. Step 3: Cross multiply
    189,555.90x = 261,587.68 × 103,515.67
  4. Step 4: Simplify right side
    189,555.90x = 27,078,424,027.14
  5. Step 5: Solve for x
    x = 27,078,424,027.14/189,555.90
  6. Step 6: Final answer
    x = 142,851.92

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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.