Home / 90,669.36-135,968.41-30,681.32

Finding the Fourth Proportional to 90,669.36, 135,968.41 and 30,681.32

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Solution

The fourth proportional to 90,669.36, 135,968.41 and 30,681.32 is: 46,009.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,669.36 : 135,968.41 = 30,681.32 : x
  2. Step 2: Convert to fraction form
    90,669.36/135,968.41 = 30,681.32/x
  3. Step 3: Cross multiply
    90,669.36x = 135,968.41 × 30,681.32
  4. Step 4: Simplify right side
    90,669.36x = 4,171,689,655.61
  5. Step 5: Solve for x
    x = 4,171,689,655.61/90,669.36
  6. Step 6: Final answer
    x = 46,009.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.