Home / 149,040.86-205,705.59-85,421.30

Finding the Fourth Proportional to 149,040.86, 205,705.59 and 85,421.30

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Solution

The fourth proportional to 149,040.86, 205,705.59 and 85,421.30 is: 117,898.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,040.86 : 205,705.59 = 85,421.30 : x
  2. Step 2: Convert to fraction form
    149,040.86/205,705.59 = 85,421.30/x
  3. Step 3: Cross multiply
    149,040.86x = 205,705.59 × 85,421.30
  4. Step 4: Simplify right side
    149,040.86x = 17,571,638,915.07
  5. Step 5: Solve for x
    x = 17,571,638,915.07/149,040.86
  6. Step 6: Final answer
    x = 117,898.13

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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.