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Finding the Fourth Proportional to 92,908.16, 128,278.08 and 71,361.92

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Solution

The fourth proportional to 92,908.16, 128,278.08 and 71,361.92 is: 98,529.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.16 : 128,278.08 = 71,361.92 : x
  2. Step 2: Convert to fraction form
    92,908.16/128,278.08 = 71,361.92/x
  3. Step 3: Cross multiply
    92,908.16x = 128,278.08 × 71,361.92
  4. Step 4: Simplify right side
    92,908.16x = 9,154,170,082.71
  5. Step 5: Solve for x
    x = 9,154,170,082.71/92,908.16
  6. Step 6: Final answer
    x = 98,529.24

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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.