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Finding the Fourth Proportional to 72,898.95, 100,588.32 and 42,260.97

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Solution

The fourth proportional to 72,898.95, 100,588.32 and 42,260.97 is: 58,313.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,898.95 : 100,588.32 = 42,260.97 : x
  2. Step 2: Convert to fraction form
    72,898.95/100,588.32 = 42,260.97/x
  3. Step 3: Cross multiply
    72,898.95x = 100,588.32 × 42,260.97
  4. Step 4: Simplify right side
    72,898.95x = 4,250,959,973.87
  5. Step 5: Solve for x
    x = 4,250,959,973.87/72,898.95
  6. Step 6: Final answer
    x = 58,313.05

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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.