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Finding the Fourth Proportional to 67,512,809.40, 101,271,978.90 and 19,643,753.40

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Solution

The fourth proportional to 67,512,809.40, 101,271,978.90 and 19,643,753.40 is: 29,466,434.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,512,809.40 : 101,271,978.90 = 19,643,753.40 : x
  2. Step 2: Convert to fraction form
    67,512,809.40/101,271,978.90 = 19,643,753.40/x
  3. Step 3: Cross multiply
    67,512,809.40x = 101,271,978.90 × 19,643,753.40
  4. Step 4: Simplify right side
    67,512,809.40x = 1,989,361,779,841,603.25
  5. Step 5: Solve for x
    x = 1,989,361,779,841,603.25/67,512,809.40
  6. Step 6: Final answer
    x = 29,466,434.56

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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.