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Finding the Fourth Proportional to 128,127.44, 176,802.36 and 74,401.88

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Solution

The fourth proportional to 128,127.44, 176,802.36 and 74,401.88 is: 102,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,127.44 : 176,802.36 = 74,401.88 : x
  2. Step 2: Convert to fraction form
    128,127.44/176,802.36 = 74,401.88/x
  3. Step 3: Cross multiply
    128,127.44x = 176,802.36 × 74,401.88
  4. Step 4: Simplify right side
    128,127.44x = 13,154,427,972.44
  5. Step 5: Solve for x
    x = 13,154,427,972.44/128,127.44
  6. Step 6: Final answer
    x = 102,666.75

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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.