Home / 81,420,539.40-122,130,809.10-20,836,265.40

Finding the Fourth Proportional to 81,420,539.40, 122,130,809.10 and 20,836,265.40

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Solution

The fourth proportional to 81,420,539.40, 122,130,809.10 and 20,836,265.40 is: 31,254,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420,539.40 : 122,130,809.10 = 20,836,265.40 : x
  2. Step 2: Convert to fraction form
    81,420,539.40/122,130,809.10 = 20,836,265.40/x
  3. Step 3: Cross multiply
    81,420,539.40x = 122,130,809.10 × 20,836,265.40
  4. Step 4: Simplify right side
    81,420,539.40x = 2,544,749,951,924,335
  5. Step 5: Solve for x
    x = 2,544,749,951,924,335/81,420,539.40
  6. Step 6: Final answer
    x = 31,254,398.10

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1.5x scale

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.