Home / 105,720.93-145,896.89-57,971.43

Finding the Fourth Proportional to 105,720.93, 145,896.89 and 57,971.43

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Solution

The fourth proportional to 105,720.93, 145,896.89 and 57,971.43 is: 80,001.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,720.93 : 145,896.89 = 57,971.43 : x
  2. Step 2: Convert to fraction form
    105,720.93/145,896.89 = 57,971.43/x
  3. Step 3: Cross multiply
    105,720.93x = 145,896.89 × 57,971.43
  4. Step 4: Simplify right side
    105,720.93x = 8,457,851,056.00
  5. Step 5: Solve for x
    x = 8,457,851,056.00/105,720.93
  6. Step 6: Final answer
    x = 80,001.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.