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Finding the Fourth Proportional to 135,697.68, 187,355.16 and 84,730.32

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Solution

The fourth proportional to 135,697.68, 187,355.16 and 84,730.32 is: 116,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,697.68 : 187,355.16 = 84,730.32 : x
  2. Step 2: Convert to fraction form
    135,697.68/187,355.16 = 84,730.32/x
  3. Step 3: Cross multiply
    135,697.68x = 187,355.16 × 84,730.32
  4. Step 4: Simplify right side
    135,697.68x = 15,874,662,660.45
  5. Step 5: Solve for x
    x = 15,874,662,660.45/135,697.68
  6. Step 6: Final answer
    x = 116,985.51

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1.5x scale

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.