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Finding the Fourth Proportional to 70,642.18, 97,486.50 and 38,811.70

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Solution

The fourth proportional to 70,642.18, 97,486.50 and 38,811.70 is: 53,560.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,642.18 : 97,486.50 = 38,811.70 : x
  2. Step 2: Convert to fraction form
    70,642.18/97,486.50 = 38,811.70/x
  3. Step 3: Cross multiply
    70,642.18x = 97,486.50 × 38,811.70
  4. Step 4: Simplify right side
    70,642.18x = 3,783,616,792.05
  5. Step 5: Solve for x
    x = 3,783,616,792.05/70,642.18
  6. Step 6: Final answer
    x = 53,560.31

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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.