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Finding the Fourth Proportional to 119,878.45, 165,432.60 and 65,431.12

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Solution

The fourth proportional to 119,878.45, 165,432.60 and 65,431.12 is: 90,295.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,878.45 : 165,432.60 = 65,431.12 : x
  2. Step 2: Convert to fraction form
    119,878.45/165,432.60 = 65,431.12/x
  3. Step 3: Cross multiply
    119,878.45x = 165,432.60 × 65,431.12
  4. Step 4: Simplify right side
    119,878.45x = 10,824,440,302.51
  5. Step 5: Solve for x
    x = 10,824,440,302.51/119,878.45
  6. Step 6: Final answer
    x = 90,295.13

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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.