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Finding the Fourth Proportional to 70,431.88, 105,027.05 and 69,800.20

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Solution

The fourth proportional to 70,431.88, 105,027.05 and 69,800.20 is: 104,085.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,431.88 : 105,027.05 = 69,800.20 : x
  2. Step 2: Convert to fraction form
    70,431.88/105,027.05 = 69,800.20/x
  3. Step 3: Cross multiply
    70,431.88x = 105,027.05 × 69,800.20
  4. Step 4: Simplify right side
    70,431.88x = 7,330,909,095.41
  5. Step 5: Solve for x
    x = 7,330,909,095.41/70,431.88
  6. Step 6: Final answer
    x = 104,085.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.