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Finding the Fourth Proportional to 328,081.77, 492,122.85 and 91,430.67

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Solution

The fourth proportional to 328,081.77, 492,122.85 and 91,430.67 is: 137,146.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,081.77 : 492,122.85 = 91,430.67 : x
  2. Step 2: Convert to fraction form
    328,081.77/492,122.85 = 91,430.67/x
  3. Step 3: Cross multiply
    328,081.77x = 492,122.85 × 91,430.67
  4. Step 4: Simplify right side
    328,081.77x = 44,995,121,897.81
  5. Step 5: Solve for x
    x = 44,995,121,897.81/328,081.77
  6. Step 6: Final answer
    x = 137,146.06

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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.