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Finding the Fourth Proportional to 72,805.50, 100,444.32 and 42,581.16

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Solution

The fourth proportional to 72,805.50, 100,444.32 and 42,581.16 is: 58,746.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.50 : 100,444.32 = 42,581.16 : x
  2. Step 2: Convert to fraction form
    72,805.50/100,444.32 = 42,581.16/x
  3. Step 3: Cross multiply
    72,805.50x = 100,444.32 × 42,581.16
  4. Step 4: Simplify right side
    72,805.50x = 4,277,035,661.01
  5. Step 5: Solve for x
    x = 4,277,035,661.01/72,805.50
  6. Step 6: Final answer
    x = 58,746.05

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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.