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Finding the Fourth Proportional to 82,943,999.60, 124,415,999.40 and 81,600,306.80

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Solution

The fourth proportional to 82,943,999.60, 124,415,999.40 and 81,600,306.80 is: 122,400,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,943,999.60 : 124,415,999.40 = 81,600,306.80 : x
  2. Step 2: Convert to fraction form
    82,943,999.60/124,415,999.40 = 81,600,306.80/x
  3. Step 3: Cross multiply
    82,943,999.60x = 124,415,999.40 × 81,600,306.80
  4. Step 4: Simplify right side
    82,943,999.60x = 10,152,383,721,868,616
  5. Step 5: Solve for x
    x = 10,152,383,721,868,616/82,943,999.60
  6. Step 6: Final answer
    x = 122,400,460.20

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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.