Home / 91,289.89-136,730.64-52,774.21

Finding the Fourth Proportional to 91,289.89, 136,730.64 and 52,774.21

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Solution

The fourth proportional to 91,289.89, 136,730.64 and 52,774.21 is: 79,043.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,289.89 : 136,730.64 = 52,774.21 : x
  2. Step 2: Convert to fraction form
    91,289.89/136,730.64 = 52,774.21/x
  3. Step 3: Cross multiply
    91,289.89x = 136,730.64 × 52,774.21
  4. Step 4: Simplify right side
    91,289.89x = 7,215,851,877.61
  5. Step 5: Solve for x
    x = 7,215,851,877.61/91,289.89
  6. Step 6: Final answer
    x = 79,043.27

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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.