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Finding the Fourth Proportional to 90,004.84, 123,989.50 and 77,042.76

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Solution

The fourth proportional to 90,004.84, 123,989.50 and 77,042.76 is: 106,133.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,004.84 : 123,989.50 = 77,042.76 : x
  2. Step 2: Convert to fraction form
    90,004.84/123,989.50 = 77,042.76/x
  3. Step 3: Cross multiply
    90,004.84x = 123,989.50 × 77,042.76
  4. Step 4: Simplify right side
    90,004.84x = 9,552,493,291.02
  5. Step 5: Solve for x
    x = 9,552,493,291.02/90,004.84
  6. Step 6: Final answer
    x = 106,133.11

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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.