Home / 99,705.60-137,596.80-57,272.64

Finding the Fourth Proportional to 99,705.60, 137,596.80 and 57,272.64

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Solution

The fourth proportional to 99,705.60, 137,596.80 and 57,272.64 is: 79,038.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,705.60 : 137,596.80 = 57,272.64 : x
  2. Step 2: Convert to fraction form
    99,705.60/137,596.80 = 57,272.64/x
  3. Step 3: Cross multiply
    99,705.60x = 137,596.80 × 57,272.64
  4. Step 4: Simplify right side
    99,705.60x = 7,880,531,991.55
  5. Step 5: Solve for x
    x = 7,880,531,991.55/99,705.60
  6. Step 6: Final answer
    x = 79,038.01

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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.