Home / 81,192,486.20-121,788,729.30-65,886,985.40

Finding the Fourth Proportional to 81,192,486.20, 121,788,729.30 and 65,886,985.40

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Solution

The fourth proportional to 81,192,486.20, 121,788,729.30 and 65,886,985.40 is: 98,830,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,192,486.20 : 121,788,729.30 = 65,886,985.40 : x
  2. Step 2: Convert to fraction form
    81,192,486.20/121,788,729.30 = 65,886,985.40/x
  3. Step 3: Cross multiply
    81,192,486.20x = 121,788,729.30 × 65,886,985.40
  4. Step 4: Simplify right side
    81,192,486.20x = 8,024,292,229,273,652
  5. Step 5: Solve for x
    x = 8,024,292,229,273,652/81,192,486.20
  6. Step 6: Final answer
    x = 98,830,478.10

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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.