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Finding the Fourth Proportional to 103,314.10, 154,971.15 and 85,818.10

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Solution

The fourth proportional to 103,314.10, 154,971.15 and 85,818.10 is: 128,727.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,314.10 : 154,971.15 = 85,818.10 : x
  2. Step 2: Convert to fraction form
    103,314.10/154,971.15 = 85,818.10/x
  3. Step 3: Cross multiply
    103,314.10x = 154,971.15 × 85,818.10
  4. Step 4: Simplify right side
    103,314.10x = 13,299,329,647.82
  5. Step 5: Solve for x
    x = 13,299,329,647.82/103,314.10
  6. Step 6: Final answer
    x = 128,727.15

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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.