Home / 103,541.40-155,312.10-91,731.60

Finding the Fourth Proportional to 103,541.40, 155,312.10 and 91,731.60

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Solution

The fourth proportional to 103,541.40, 155,312.10 and 91,731.60 is: 137,597.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,541.40 : 155,312.10 = 91,731.60 : x
  2. Step 2: Convert to fraction form
    103,541.40/155,312.10 = 91,731.60/x
  3. Step 3: Cross multiply
    103,541.40x = 155,312.10 × 91,731.60
  4. Step 4: Simplify right side
    103,541.40x = 14,247,027,432.36
  5. Step 5: Solve for x
    x = 14,247,027,432.36/103,541.40
  6. Step 6: Final answer
    x = 137,597.40

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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.