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Finding the Fourth Proportional to 128,580.98, 177,528.47 and 80,256.53

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Solution

The fourth proportional to 128,580.98, 177,528.47 and 80,256.53 is: 110,808.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,580.98 : 177,528.47 = 80,256.53 : x
  2. Step 2: Convert to fraction form
    128,580.98/177,528.47 = 80,256.53/x
  3. Step 3: Cross multiply
    128,580.98x = 177,528.47 × 80,256.53
  4. Step 4: Simplify right side
    128,580.98x = 14,247,818,203.60
  5. Step 5: Solve for x
    x = 14,247,818,203.60/128,580.98
  6. Step 6: Final answer
    x = 110,808.13

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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.