Home / 135,157.20-186,509.40-74,724.32

Finding the Fourth Proportional to 135,157.20, 186,509.40 and 74,724.32

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Solution

The fourth proportional to 135,157.20, 186,509.40 and 74,724.32 is: 103,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,157.20 : 186,509.40 = 74,724.32 : x
  2. Step 2: Convert to fraction form
    135,157.20/186,509.40 = 74,724.32/x
  3. Step 3: Cross multiply
    135,157.20x = 186,509.40 × 74,724.32
  4. Step 4: Simplify right side
    135,157.20x = 13,936,788,088.61
  5. Step 5: Solve for x
    x = 13,936,788,088.61/135,157.20
  6. Step 6: Final answer
    x = 103,115.40

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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.