Home / 72,040.69-99,412.95-40,208.86

Finding the Fourth Proportional to 72,040.69, 99,412.95 and 40,208.86

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Solution

The fourth proportional to 72,040.69, 99,412.95 and 40,208.86 is: 55,486.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.69 : 99,412.95 = 40,208.86 : x
  2. Step 2: Convert to fraction form
    72,040.69/99,412.95 = 40,208.86/x
  3. Step 3: Cross multiply
    72,040.69x = 99,412.95 × 40,208.86
  4. Step 4: Simplify right side
    72,040.69x = 3,997,281,388.74
  5. Step 5: Solve for x
    x = 3,997,281,388.74/72,040.69
  6. Step 6: Final answer
    x = 55,486.44

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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.