Home / 81,656,231.60-122,484,347.40-75,420,657.20

Finding the Fourth Proportional to 81,656,231.60, 122,484,347.40 and 75,420,657.20

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Solution

The fourth proportional to 81,656,231.60, 122,484,347.40 and 75,420,657.20 is: 113,130,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656,231.60 : 122,484,347.40 = 75,420,657.20 : x
  2. Step 2: Convert to fraction form
    81,656,231.60/122,484,347.40 = 75,420,657.20/x
  3. Step 3: Cross multiply
    81,656,231.60x = 122,484,347.40 × 75,420,657.20
  4. Step 4: Simplify right side
    81,656,231.60x = 9,237,849,977,621,112
  5. Step 5: Solve for x
    x = 9,237,849,977,621,112/81,656,231.60
  6. Step 6: Final answer
    x = 113,130,985.80

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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.