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Finding the Fourth Proportional to 84,889.96, 127,312.16 and 40,428.25

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Solution

The fourth proportional to 84,889.96, 127,312.16 and 40,428.25 is: 60,631.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,889.96 : 127,312.16 = 40,428.25 : x
  2. Step 2: Convert to fraction form
    84,889.96/127,312.16 = 40,428.25/x
  3. Step 3: Cross multiply
    84,889.96x = 127,312.16 × 40,428.25
  4. Step 4: Simplify right side
    84,889.96x = 5,147,007,312.10
  5. Step 5: Solve for x
    x = 5,147,007,312.10/84,889.96
  6. Step 6: Final answer
    x = 60,631.52

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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.