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Finding the Fourth Proportional to 128,993.89, 178,024.15 and 74,548.91

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Solution

The fourth proportional to 128,993.89, 178,024.15 and 74,548.91 is: 102,884.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,993.89 : 178,024.15 = 74,548.91 : x
  2. Step 2: Convert to fraction form
    128,993.89/178,024.15 = 74,548.91/x
  3. Step 3: Cross multiply
    128,993.89x = 178,024.15 × 74,548.91
  4. Step 4: Simplify right side
    128,993.89x = 13,271,506,082.71
  5. Step 5: Solve for x
    x = 13,271,506,082.71/128,993.89
  6. Step 6: Final answer
    x = 102,884.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.