Home / 72,172.50-99,599.85-40,346.70

Finding the Fourth Proportional to 72,172.50, 99,599.85 and 40,346.70

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Solution

The fourth proportional to 72,172.50, 99,599.85 and 40,346.70 is: 55,679.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,172.50 : 99,599.85 = 40,346.70 : x
  2. Step 2: Convert to fraction form
    72,172.50/99,599.85 = 40,346.70/x
  3. Step 3: Cross multiply
    72,172.50x = 99,599.85 × 40,346.70
  4. Step 4: Simplify right side
    72,172.50x = 4,018,525,268.00
  5. Step 5: Solve for x
    x = 4,018,525,268.00/72,172.50
  6. Step 6: Final answer
    x = 55,679.45

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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.