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Finding the Fourth Proportional to 72,984.94, 100,720.34 and 42,763.04

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Solution

The fourth proportional to 72,984.94, 100,720.34 and 42,763.04 is: 59,013.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984.94 : 100,720.34 = 42,763.04 : x
  2. Step 2: Convert to fraction form
    72,984.94/100,720.34 = 42,763.04/x
  3. Step 3: Cross multiply
    72,984.94x = 100,720.34 × 42,763.04
  4. Step 4: Simplify right side
    72,984.94x = 4,307,107,928.23
  5. Step 5: Solve for x
    x = 4,307,107,928.23/72,984.94
  6. Step 6: Final answer
    x = 59,013.65

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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.