Home / 81,693,005.10-122,539,507.65-75,457,430.70

Finding the Fourth Proportional to 81,693,005.10, 122,539,507.65 and 75,457,430.70

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Solution

The fourth proportional to 81,693,005.10, 122,539,507.65 and 75,457,430.70 is: 113,186,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693,005.10 : 122,539,507.65 = 75,457,430.70 : x
  2. Step 2: Convert to fraction form
    81,693,005.10/122,539,507.65 = 75,457,430.70/x
  3. Step 3: Cross multiply
    81,693,005.10x = 122,539,507.65 × 75,457,430.70
  4. Step 4: Simplify right side
    81,693,005.10x = 9,246,516,406,511,996
  5. Step 5: Solve for x
    x = 9,246,516,406,511,996/81,693,005.10
  6. Step 6: Final answer
    x = 113,186,146.05

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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.