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Finding the Fourth Proportional to 72,937.50, 100,653.75 and 39,403.50

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Solution

The fourth proportional to 72,937.50, 100,653.75 and 39,403.50 is: 54,376.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.50 : 100,653.75 = 39,403.50 : x
  2. Step 2: Convert to fraction form
    72,937.50/100,653.75 = 39,403.50/x
  3. Step 3: Cross multiply
    72,937.50x = 100,653.75 × 39,403.50
  4. Step 4: Simplify right side
    72,937.50x = 3,966,110,038.13
  5. Step 5: Solve for x
    x = 3,966,110,038.13/72,937.50
  6. Step 6: Final answer
    x = 54,376.83

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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.