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Finding the Fourth Proportional to 74,478.60, 102,746.22 and 65,989.38

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Solution

The fourth proportional to 74,478.60, 102,746.22 and 65,989.38 is: 91,035.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,478.60 : 102,746.22 = 65,989.38 : x
  2. Step 2: Convert to fraction form
    74,478.60/102,746.22 = 65,989.38/x
  3. Step 3: Cross multiply
    74,478.60x = 102,746.22 × 65,989.38
  4. Step 4: Simplify right side
    74,478.60x = 6,780,159,355.14
  5. Step 5: Solve for x
    x = 6,780,159,355.14/74,478.60
  6. Step 6: Final answer
    x = 91,035.00

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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.