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Finding the Fourth Proportional to 70,409.80, 97,165.38 and 38,579.72

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Solution

The fourth proportional to 70,409.80, 97,165.38 and 38,579.72 is: 53,239.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,409.80 : 97,165.38 = 38,579.72 : x
  2. Step 2: Convert to fraction form
    70,409.80/97,165.38 = 38,579.72/x
  3. Step 3: Cross multiply
    70,409.80x = 97,165.38 × 38,579.72
  4. Step 4: Simplify right side
    70,409.80x = 3,748,613,154.09
  5. Step 5: Solve for x
    x = 3,748,613,154.09/70,409.80
  6. Step 6: Final answer
    x = 53,239.93

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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.