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Finding the Fourth Proportional to 103,181.72, 154,746.59 and 39,980.12

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Solution

The fourth proportional to 103,181.72, 154,746.59 and 39,980.12 is: 59,960.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,181.72 : 154,746.59 = 39,980.12 : x
  2. Step 2: Convert to fraction form
    103,181.72/154,746.59 = 39,980.12/x
  3. Step 3: Cross multiply
    103,181.72x = 154,746.59 × 39,980.12
  4. Step 4: Simplify right side
    103,181.72x = 6,186,786,264.16
  5. Step 5: Solve for x
    x = 6,186,786,264.16/103,181.72
  6. Step 6: Final answer
    x = 59,960.10

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1.5x scale

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.