Home / 71,840.55-99,143.04-40,009.45

Finding the Fourth Proportional to 71,840.55, 99,143.04 and 40,009.45

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Solution

The fourth proportional to 71,840.55, 99,143.04 and 40,009.45 is: 55,214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,840.55 : 99,143.04 = 40,009.45 : x
  2. Step 2: Convert to fraction form
    71,840.55/99,143.04 = 40,009.45/x
  3. Step 3: Cross multiply
    71,840.55x = 99,143.04 × 40,009.45
  4. Step 4: Simplify right side
    71,840.55x = 3,966,658,301.68
  5. Step 5: Solve for x
    x = 3,966,658,301.68/71,840.55
  6. Step 6: Final answer
    x = 55,214.75

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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.