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Finding the Fourth Proportional to 128,253.93, 176,898.60 and 90,022.02

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Solution

The fourth proportional to 128,253.93, 176,898.60 and 90,022.02 is: 124,165.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,253.93 : 176,898.60 = 90,022.02 : x
  2. Step 2: Convert to fraction form
    128,253.93/176,898.60 = 90,022.02/x
  3. Step 3: Cross multiply
    128,253.93x = 176,898.60 × 90,022.02
  4. Step 4: Simplify right side
    128,253.93x = 15,924,769,307.17
  5. Step 5: Solve for x
    x = 15,924,769,307.17/128,253.93
  6. Step 6: Final answer
    x = 124,165.94

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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.