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Finding the Fourth Proportional to 72,630.15, 100,238.16 and 40,798.90

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Solution

The fourth proportional to 72,630.15, 100,238.16 and 40,798.90 is: 56,307.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.15 : 100,238.16 = 40,798.90 : x
  2. Step 2: Convert to fraction form
    72,630.15/100,238.16 = 40,798.90/x
  3. Step 3: Cross multiply
    72,630.15x = 100,238.16 × 40,798.90
  4. Step 4: Simplify right side
    72,630.15x = 4,089,606,666.02
  5. Step 5: Solve for x
    x = 4,089,606,666.02/72,630.15
  6. Step 6: Final answer
    x = 56,307.29

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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.