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Finding the Fourth Proportional to 70,805.39, 97,720.76 and 42,512.90

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Solution

The fourth proportional to 70,805.39, 97,720.76 and 42,512.90 is: 58,673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,805.39 : 97,720.76 = 42,512.90 : x
  2. Step 2: Convert to fraction form
    70,805.39/97,720.76 = 42,512.90/x
  3. Step 3: Cross multiply
    70,805.39x = 97,720.76 × 42,512.90
  4. Step 4: Simplify right side
    70,805.39x = 4,154,392,515.48
  5. Step 5: Solve for x
    x = 4,154,392,515.48/70,805.39
  6. Step 6: Final answer
    x = 58,673.40

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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.