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Finding the Fourth Proportional to 103,479.36, 142,836.48 and 67,230.40

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Solution

The fourth proportional to 103,479.36, 142,836.48 and 67,230.40 is: 92,800.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,479.36 : 142,836.48 = 67,230.40 : x
  2. Step 2: Convert to fraction form
    103,479.36/142,836.48 = 67,230.40/x
  3. Step 3: Cross multiply
    103,479.36x = 142,836.48 × 67,230.40
  4. Step 4: Simplify right side
    103,479.36x = 9,602,953,684.99
  5. Step 5: Solve for x
    x = 9,602,953,684.99/103,479.36
  6. Step 6: Final answer
    x = 92,800.67

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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.