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Finding the Fourth Proportional to 75,688.40, 113,313.90 and 73,501.40

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Solution

The fourth proportional to 75,688.40, 113,313.90 and 73,501.40 is: 110,039.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,688.40 : 113,313.90 = 73,501.40 : x
  2. Step 2: Convert to fraction form
    75,688.40/113,313.90 = 73,501.40/x
  3. Step 3: Cross multiply
    75,688.40x = 113,313.90 × 73,501.40
  4. Step 4: Simplify right side
    75,688.40x = 8,328,730,289.46
  5. Step 5: Solve for x
    x = 8,328,730,289.46/75,688.40
  6. Step 6: Final answer
    x = 110,039.72

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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.