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Finding the Fourth Proportional to 71,412.81, 98,552.79 and 39,581.64

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Solution

The fourth proportional to 71,412.81, 98,552.79 and 39,581.64 is: 54,624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,412.81 : 98,552.79 = 39,581.64 : x
  2. Step 2: Convert to fraction form
    71,412.81/98,552.79 = 39,581.64/x
  3. Step 3: Cross multiply
    71,412.81x = 98,552.79 × 39,581.64
  4. Step 4: Simplify right side
    71,412.81x = 3,900,881,054.78
  5. Step 5: Solve for x
    x = 3,900,881,054.78/71,412.81
  6. Step 6: Final answer
    x = 54,624.39

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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.