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Finding the Fourth Proportional to 143,740.77, 215,643.95 and 43,915.15

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Solution

The fourth proportional to 143,740.77, 215,643.95 and 43,915.15 is: 65,882.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,740.77 : 215,643.95 = 43,915.15 : x
  2. Step 2: Convert to fraction form
    143,740.77/215,643.95 = 43,915.15/x
  3. Step 3: Cross multiply
    143,740.77x = 215,643.95 × 43,915.15
  4. Step 4: Simplify right side
    143,740.77x = 9,470,036,410.84
  5. Step 5: Solve for x
    x = 9,470,036,410.84/143,740.77
  6. Step 6: Final answer
    x = 65,882.74

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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.