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Finding the Fourth Proportional to 94,989.70, 142,513.08 and 28,432

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Solution

The fourth proportional to 94,989.70, 142,513.08 and 28,432 is: 42,656.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,989.70 : 142,513.08 = 28,432 : x
  2. Step 2: Convert to fraction form
    94,989.70/142,513.08 = 28,432/x
  3. Step 3: Cross multiply
    94,989.70x = 142,513.08 × 28,432
  4. Step 4: Simplify right side
    94,989.70x = 4,051,931,890.56
  5. Step 5: Solve for x
    x = 4,051,931,890.56/94,989.70
  6. Step 6: Final answer
    x = 42,656.54

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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.