Home / 129,292.72-178,220.64-118,445.20

Finding the Fourth Proportional to 129,292.72, 178,220.64 and 118,445.20

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Solution

The fourth proportional to 129,292.72, 178,220.64 and 118,445.20 is: 163,268.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,292.72 : 178,220.64 = 118,445.20 : x
  2. Step 2: Convert to fraction form
    129,292.72/178,220.64 = 118,445.20/x
  3. Step 3: Cross multiply
    129,292.72x = 178,220.64 × 118,445.20
  4. Step 4: Simplify right side
    129,292.72x = 21,109,379,348.93
  5. Step 5: Solve for x
    x = 21,109,379,348.93/129,292.72
  6. Step 6: Final answer
    x = 163,268.12

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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.