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Finding the Fourth Proportional to 92,403.20, 138,313.20 and 72,574.40

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Solution

The fourth proportional to 92,403.20, 138,313.20 and 72,574.40 is: 108,632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,403.20 : 138,313.20 = 72,574.40 : x
  2. Step 2: Convert to fraction form
    92,403.20/138,313.20 = 72,574.40/x
  3. Step 3: Cross multiply
    92,403.20x = 138,313.20 × 72,574.40
  4. Step 4: Simplify right side
    92,403.20x = 10,037,997,502.08
  5. Step 5: Solve for x
    x = 10,037,997,502.08/92,403.20
  6. Step 6: Final answer
    x = 108,632.57

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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.