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Finding the Fourth Proportional to 119,790.64, 165,159.30 and 78,948.40

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Solution

The fourth proportional to 119,790.64, 165,159.30 and 78,948.40 is: 108,848.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,790.64 : 165,159.30 = 78,948.40 : x
  2. Step 2: Convert to fraction form
    119,790.64/165,159.30 = 78,948.40/x
  3. Step 3: Cross multiply
    119,790.64x = 165,159.30 × 78,948.40
  4. Step 4: Simplify right side
    119,790.64x = 13,039,062,480.12
  5. Step 5: Solve for x
    x = 13,039,062,480.12/119,790.64
  6. Step 6: Final answer
    x = 108,848.76

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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.