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Finding the Fourth Proportional to 70,779.40, 97,671.06 and 40,564.36

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Solution

The fourth proportional to 70,779.40, 97,671.06 and 40,564.36 is: 55,976.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.40 : 97,671.06 = 40,564.36 : x
  2. Step 2: Convert to fraction form
    70,779.40/97,671.06 = 40,564.36/x
  3. Step 3: Cross multiply
    70,779.40x = 97,671.06 × 40,564.36
  4. Step 4: Simplify right side
    70,779.40x = 3,961,964,039.42
  5. Step 5: Solve for x
    x = 3,961,964,039.42/70,779.40
  6. Step 6: Final answer
    x = 55,976.23

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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.