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Finding the Fourth Proportional to 92,138.16, 138,173.16 and 72,455.16

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Solution

The fourth proportional to 92,138.16, 138,173.16 and 72,455.16 is: 108,655.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,138.16 : 138,173.16 = 72,455.16 : x
  2. Step 2: Convert to fraction form
    92,138.16/138,173.16 = 72,455.16/x
  3. Step 3: Cross multiply
    92,138.16x = 138,173.16 × 72,455.16
  4. Step 4: Simplify right side
    92,138.16x = 10,011,358,415.51
  5. Step 5: Solve for x
    x = 10,011,358,415.51/92,138.16
  6. Step 6: Final answer
    x = 108,655.94

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1.5x scale

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.