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Finding the Fourth Proportional to 38,891,734.66, 53,671,676.01 and 21,489,200.98

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Solution

The fourth proportional to 38,891,734.66, 53,671,676.01 and 21,489,200.98 is: 29,655,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,891,734.66 : 53,671,676.01 = 21,489,200.98 : x
  2. Step 2: Convert to fraction form
    38,891,734.66/53,671,676.01 = 21,489,200.98/x
  3. Step 3: Cross multiply
    38,891,734.66x = 53,671,676.01 × 21,489,200.98
  4. Step 4: Simplify right side
    38,891,734.66x = 1,153,361,432,712,334.50
  5. Step 5: Solve for x
    x = 1,153,361,432,712,334.50/38,891,734.66
  6. Step 6: Final answer
    x = 29,655,695.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.