Home / 72,979,291.90-109,454,941.05-21,862,978.30

Finding the Fourth Proportional to 72,979,291.90, 109,454,941.05 and 21,862,978.30

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Solution

The fourth proportional to 72,979,291.90, 109,454,941.05 and 21,862,978.30 is: 32,790,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979,291.90 : 109,454,941.05 = 21,862,978.30 : x
  2. Step 2: Convert to fraction form
    72,979,291.90/109,454,941.05 = 21,862,978.30/x
  3. Step 3: Cross multiply
    72,979,291.90x = 109,454,941.05 × 21,862,978.30
  4. Step 4: Simplify right side
    72,979,291.90x = 2,393,011,001,003,929
  5. Step 5: Solve for x
    x = 2,393,011,001,003,929/72,979,291.90
  6. Step 6: Final answer
    x = 32,790,274.32

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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.