Home / 128,564.16-177,397.38-80,783.64

Finding the Fourth Proportional to 128,564.16, 177,397.38 and 80,783.64

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Solution

The fourth proportional to 128,564.16, 177,397.38 and 80,783.64 is: 111,468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.16 : 177,397.38 = 80,783.64 : x
  2. Step 2: Convert to fraction form
    128,564.16/177,397.38 = 80,783.64/x
  3. Step 3: Cross multiply
    128,564.16x = 177,397.38 × 80,783.64
  4. Step 4: Simplify right side
    128,564.16x = 14,330,806,082.86
  5. Step 5: Solve for x
    x = 14,330,806,082.86/128,564.16
  6. Step 6: Final answer
    x = 111,468.13

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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.