Home / 71,990.34-99,349.74-40,159.23

Finding the Fourth Proportional to 71,990.34, 99,349.74 and 40,159.23

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Solution

The fourth proportional to 71,990.34, 99,349.74 and 40,159.23 is: 55,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,990.34 : 99,349.74 = 40,159.23 : x
  2. Step 2: Convert to fraction form
    71,990.34/99,349.74 = 40,159.23/x
  3. Step 3: Cross multiply
    71,990.34x = 99,349.74 × 40,159.23
  4. Step 4: Simplify right side
    71,990.34x = 3,989,809,059.10
  5. Step 5: Solve for x
    x = 3,989,809,059.10/71,990.34
  6. Step 6: Final answer
    x = 55,421.45

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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.