Home / 91,815.36-137,400-56,265.60

Finding the Fourth Proportional to 91,815.36, 137,400 and 56,265.60

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Solution

The fourth proportional to 91,815.36, 137,400 and 56,265.60 is: 84,200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,815.36 : 137,400 = 56,265.60 : x
  2. Step 2: Convert to fraction form
    91,815.36/137,400 = 56,265.60/x
  3. Step 3: Cross multiply
    91,815.36x = 137,400 × 56,265.60
  4. Step 4: Simplify right side
    91,815.36x = 7,730,893,440
  5. Step 5: Solve for x
    x = 7,730,893,440/91,815.36
  6. Step 6: Final answer
    x = 84,200.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.