Home / 72,985.27-109,539.41-28,643.16

Finding the Fourth Proportional to 72,985.27, 109,539.41 and 28,643.16

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Solution

The fourth proportional to 72,985.27, 109,539.41 and 28,643.16 is: 42,988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.27 : 109,539.41 = 28,643.16 : x
  2. Step 2: Convert to fraction form
    72,985.27/109,539.41 = 28,643.16/x
  3. Step 3: Cross multiply
    72,985.27x = 109,539.41 × 28,643.16
  4. Step 4: Simplify right side
    72,985.27x = 3,137,554,918.54
  5. Step 5: Solve for x
    x = 3,137,554,918.54/72,985.27
  6. Step 6: Final answer
    x = 42,988.88

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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.