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Finding the Fourth Proportional to 189,485.70, 261,495.02 and 107,809.46

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Solution

The fourth proportional to 189,485.70, 261,495.02 and 107,809.46 is: 148,779.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,485.70 : 261,495.02 = 107,809.46 : x
  2. Step 2: Convert to fraction form
    189,485.70/261,495.02 = 107,809.46/x
  3. Step 3: Cross multiply
    189,485.70x = 261,495.02 × 107,809.46
  4. Step 4: Simplify right side
    189,485.70x = 28,191,635,860.94
  5. Step 5: Solve for x
    x = 28,191,635,860.94/189,485.70
  6. Step 6: Final answer
    x = 148,779.75

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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.