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Finding the Fourth Proportional to 81,420.94, 112,362.06 and 47,428.54

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Solution

The fourth proportional to 81,420.94, 112,362.06 and 47,428.54 is: 65,452.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.94 : 112,362.06 = 47,428.54 : x
  2. Step 2: Convert to fraction form
    81,420.94/112,362.06 = 47,428.54/x
  3. Step 3: Cross multiply
    81,420.94x = 112,362.06 × 47,428.54
  4. Step 4: Simplify right side
    81,420.94x = 5,329,168,457.19
  5. Step 5: Solve for x
    x = 5,329,168,457.19/81,420.94
  6. Step 6: Final answer
    x = 65,452.06

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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.