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Finding the Fourth Proportional to 91,312.50, 136,968.81 and 28,983

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Solution

The fourth proportional to 91,312.50, 136,968.81 and 28,983 is: 43,474.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,312.50 : 136,968.81 = 28,983 : x
  2. Step 2: Convert to fraction form
    91,312.50/136,968.81 = 28,983/x
  3. Step 3: Cross multiply
    91,312.50x = 136,968.81 × 28,983
  4. Step 4: Simplify right side
    91,312.50x = 3,969,767,020.23
  5. Step 5: Solve for x
    x = 3,969,767,020.23/91,312.50
  6. Step 6: Final answer
    x = 43,474.52

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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.