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Finding the Fourth Proportional to 90,003.84, 123,988.13 and 77,041.76

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Solution

The fourth proportional to 90,003.84, 123,988.13 and 77,041.76 is: 106,131.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,003.84 : 123,988.13 = 77,041.76 : x
  2. Step 2: Convert to fraction form
    90,003.84/123,988.13 = 77,041.76/x
  3. Step 3: Cross multiply
    90,003.84x = 123,988.13 × 77,041.76
  4. Step 4: Simplify right side
    90,003.84x = 9,552,263,369.10
  5. Step 5: Solve for x
    x = 9,552,263,369.10/90,003.84
  6. Step 6: Final answer
    x = 106,131.74

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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.