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Finding the Fourth Proportional to 70,520.60, 97,316.72 and 38,689.22

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Solution

The fourth proportional to 70,520.60, 97,316.72 and 38,689.22 is: 53,390.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,520.60 : 97,316.72 = 38,689.22 : x
  2. Step 2: Convert to fraction form
    70,520.60/97,316.72 = 38,689.22/x
  3. Step 3: Cross multiply
    70,520.60x = 97,316.72 × 38,689.22
  4. Step 4: Simplify right side
    70,520.60x = 3,765,107,989.76
  5. Step 5: Solve for x
    x = 3,765,107,989.76/70,520.60
  6. Step 6: Final answer
    x = 53,390.19

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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.