Home / 72,931.89-109,354.10-28,505.72

Finding the Fourth Proportional to 72,931.89, 109,354.10 and 28,505.72

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Solution

The fourth proportional to 72,931.89, 109,354.10 and 28,505.72 is: 42,741.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,931.89 : 109,354.10 = 28,505.72 : x
  2. Step 2: Convert to fraction form
    72,931.89/109,354.10 = 28,505.72/x
  3. Step 3: Cross multiply
    72,931.89x = 109,354.10 × 28,505.72
  4. Step 4: Simplify right side
    72,931.89x = 3,117,217,646.65
  5. Step 5: Solve for x
    x = 3,117,217,646.65/72,931.89
  6. Step 6: Final answer
    x = 42,741.49

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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.