Home / 91,221-136,719.18-64,782.60

Finding the Fourth Proportional to 91,221, 136,719.18 and 64,782.60

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Solution

The fourth proportional to 91,221, 136,719.18 and 64,782.60 is: 97,094.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,221 : 136,719.18 = 64,782.60 : x
  2. Step 2: Convert to fraction form
    91,221/136,719.18 = 64,782.60/x
  3. Step 3: Cross multiply
    91,221x = 136,719.18 × 64,782.60
  4. Step 4: Simplify right side
    91,221x = 8,857,023,950.27
  5. Step 5: Solve for x
    x = 8,857,023,950.27/91,221
  6. Step 6: Final answer
    x = 97,094.13

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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.