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Finding the Fourth Proportional to 119,877.45, 165,431.22 and 65,430.12

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Solution

The fourth proportional to 119,877.45, 165,431.22 and 65,430.12 is: 90,293.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,877.45 : 165,431.22 = 65,430.12 : x
  2. Step 2: Convert to fraction form
    119,877.45/165,431.22 = 65,430.12/x
  3. Step 3: Cross multiply
    119,877.45x = 165,431.22 × 65,430.12
  4. Step 4: Simplify right side
    119,877.45x = 10,824,184,576.35
  5. Step 5: Solve for x
    x = 10,824,184,576.35/119,877.45
  6. Step 6: Final answer
    x = 90,293.75

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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.