Home / 81,657,191.20-122,485,786.80-30,528,630.40

Finding the Fourth Proportional to 81,657,191.20, 122,485,786.80 and 30,528,630.40

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Solution

The fourth proportional to 81,657,191.20, 122,485,786.80 and 30,528,630.40 is: 45,792,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657,191.20 : 122,485,786.80 = 30,528,630.40 : x
  2. Step 2: Convert to fraction form
    81,657,191.20/122,485,786.80 = 30,528,630.40/x
  3. Step 3: Cross multiply
    81,657,191.20x = 122,485,786.80 × 30,528,630.40
  4. Step 4: Simplify right side
    81,657,191.20x = 3,739,323,314,470,398.50
  5. Step 5: Solve for x
    x = 3,739,323,314,470,398.50/81,657,191.20
  6. Step 6: Final answer
    x = 45,792,945.60

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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.