Home / 128,397.44-177,258.12-77,419.28

Finding the Fourth Proportional to 128,397.44, 177,258.12 and 77,419.28

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Solution

The fourth proportional to 128,397.44, 177,258.12 and 77,419.28 is: 106,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,397.44 : 177,258.12 = 77,419.28 : x
  2. Step 2: Convert to fraction form
    128,397.44/177,258.12 = 77,419.28/x
  3. Step 3: Cross multiply
    128,397.44x = 177,258.12 × 77,419.28
  4. Step 4: Simplify right side
    128,397.44x = 13,723,196,024.55
  5. Step 5: Solve for x
    x = 13,723,196,024.55/128,397.44
  6. Step 6: Final answer
    x = 106,880.60

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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.