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Finding the Fourth Proportional to 189,008.20, 260,828.40 and 104,128.30

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Solution

The fourth proportional to 189,008.20, 260,828.40 and 104,128.30 is: 143,695.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,008.20 : 260,828.40 = 104,128.30 : x
  2. Step 2: Convert to fraction form
    189,008.20/260,828.40 = 104,128.30/x
  3. Step 3: Cross multiply
    189,008.20x = 260,828.40 × 104,128.30
  4. Step 4: Simplify right side
    189,008.20x = 27,159,617,883.72
  5. Step 5: Solve for x
    x = 27,159,617,883.72/189,008.20
  6. Step 6: Final answer
    x = 143,695.45

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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.