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Finding the Fourth Proportional to 73,935.72, 102,049.47 and 61,980.12

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Solution

The fourth proportional to 73,935.72, 102,049.47 and 61,980.12 is: 85,547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,935.72 : 102,049.47 = 61,980.12 : x
  2. Step 2: Convert to fraction form
    73,935.72/102,049.47 = 61,980.12/x
  3. Step 3: Cross multiply
    73,935.72x = 102,049.47 × 61,980.12
  4. Step 4: Simplify right side
    73,935.72x = 6,325,038,396.54
  5. Step 5: Solve for x
    x = 6,325,038,396.54/73,935.72
  6. Step 6: Final answer
    x = 85,547.80

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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.