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Finding the Fourth Proportional to 103,709.66, 143,081.90 and 67,920.08

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Solution

The fourth proportional to 103,709.66, 143,081.90 and 67,920.08 is: 93,705.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,709.66 : 143,081.90 = 67,920.08 : x
  2. Step 2: Convert to fraction form
    103,709.66/143,081.90 = 67,920.08/x
  3. Step 3: Cross multiply
    103,709.66x = 143,081.90 × 67,920.08
  4. Step 4: Simplify right side
    103,709.66x = 9,718,134,094.55
  5. Step 5: Solve for x
    x = 9,718,134,094.55/103,709.66
  6. Step 6: Final answer
    x = 93,705.20

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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.