Home / 90,968-136,456.86-28,643.36

Finding the Fourth Proportional to 90,968, 136,456.86 and 28,643.36

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Solution

The fourth proportional to 90,968, 136,456.86 and 28,643.36 is: 42,966.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,968 : 136,456.86 = 28,643.36 : x
  2. Step 2: Convert to fraction form
    90,968/136,456.86 = 28,643.36/x
  3. Step 3: Cross multiply
    90,968x = 136,456.86 × 28,643.36
  4. Step 4: Simplify right side
    90,968x = 3,908,582,965.45
  5. Step 5: Solve for x
    x = 3,908,582,965.45/90,968
  6. Step 6: Final answer
    x = 42,966.57

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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.