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Finding the Fourth Proportional to 85,368.10, 128,052.15 and 40,984.15

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Solution

The fourth proportional to 85,368.10, 128,052.15 and 40,984.15 is: 61,476.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,368.10 : 128,052.15 = 40,984.15 : x
  2. Step 2: Convert to fraction form
    85,368.10/128,052.15 = 40,984.15/x
  3. Step 3: Cross multiply
    85,368.10x = 128,052.15 × 40,984.15
  4. Step 4: Simplify right side
    85,368.10x = 5,248,108,523.42
  5. Step 5: Solve for x
    x = 5,248,108,523.42/85,368.10
  6. Step 6: Final answer
    x = 61,476.23

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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.