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Finding the Fourth Proportional to 72,465.81, 108,526.88 and 57,424.56

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Solution

The fourth proportional to 72,465.81, 108,526.88 and 57,424.56 is: 86,000.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,465.81 : 108,526.88 = 57,424.56 : x
  2. Step 2: Convert to fraction form
    72,465.81/108,526.88 = 57,424.56/x
  3. Step 3: Cross multiply
    72,465.81x = 108,526.88 × 57,424.56
  4. Step 4: Simplify right side
    72,465.81x = 6,232,108,045.05
  5. Step 5: Solve for x
    x = 6,232,108,045.05/72,465.81
  6. Step 6: Final answer
    x = 86,000.67

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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.