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Finding the Fourth Proportional to 77,688.40, 116,532.60 and 38,251.60

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Solution

The fourth proportional to 77,688.40, 116,532.60 and 38,251.60 is: 57,377.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,688.40 : 116,532.60 = 38,251.60 : x
  2. Step 2: Convert to fraction form
    77,688.40/116,532.60 = 38,251.60/x
  3. Step 3: Cross multiply
    77,688.40x = 116,532.60 × 38,251.60
  4. Step 4: Simplify right side
    77,688.40x = 4,457,558,402.16
  5. Step 5: Solve for x
    x = 4,457,558,402.16/77,688.40
  6. Step 6: Final answer
    x = 57,377.40

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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.