Home / 115,909.40-173,638.51-85,459.07

Finding the Fourth Proportional to 115,909.40, 173,638.51 and 85,459.07

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Solution

The fourth proportional to 115,909.40, 173,638.51 and 85,459.07 is: 128,022.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.40 : 173,638.51 = 85,459.07 : x
  2. Step 2: Convert to fraction form
    115,909.40/173,638.51 = 85,459.07/x
  3. Step 3: Cross multiply
    115,909.40x = 173,638.51 × 85,459.07
  4. Step 4: Simplify right side
    115,909.40x = 14,838,984,824.52
  5. Step 5: Solve for x
    x = 14,838,984,824.52/115,909.40
  6. Step 6: Final answer
    x = 128,022.28

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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.