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Finding the Fourth Proportional to 70,798.59, 97,690.86 and 40,578.09

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Solution

The fourth proportional to 70,798.59, 97,690.86 and 40,578.09 is: 55,991.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,798.59 : 97,690.86 = 40,578.09 : x
  2. Step 2: Convert to fraction form
    70,798.59/97,690.86 = 40,578.09/x
  3. Step 3: Cross multiply
    70,798.59x = 97,690.86 × 40,578.09
  4. Step 4: Simplify right side
    70,798.59x = 3,964,108,509.26
  5. Step 5: Solve for x
    x = 3,964,108,509.26/70,798.59
  6. Step 6: Final answer
    x = 55,991.35

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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.