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Finding the Fourth Proportional to 70,813.71, 97,719.21 and 38,976.39

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Solution

The fourth proportional to 70,813.71, 97,719.21 and 38,976.39 is: 53,785.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,813.71 : 97,719.21 = 38,976.39 : x
  2. Step 2: Convert to fraction form
    70,813.71/97,719.21 = 38,976.39/x
  3. Step 3: Cross multiply
    70,813.71x = 97,719.21 × 38,976.39
  4. Step 4: Simplify right side
    70,813.71x = 3,808,742,039.45
  5. Step 5: Solve for x
    x = 3,808,742,039.45/70,813.71
  6. Step 6: Final answer
    x = 53,785.38

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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.