Home / 72,143.42-99,557.44-40,312.40

Finding the Fourth Proportional to 72,143.42, 99,557.44 and 40,312.40

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Solution

The fourth proportional to 72,143.42, 99,557.44 and 40,312.40 is: 55,630.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.42 : 99,557.44 = 40,312.40 : x
  2. Step 2: Convert to fraction form
    72,143.42/99,557.44 = 40,312.40/x
  3. Step 3: Cross multiply
    72,143.42x = 99,557.44 × 40,312.40
  4. Step 4: Simplify right side
    72,143.42x = 4,013,398,745.69
  5. Step 5: Solve for x
    x = 4,013,398,745.69/72,143.42
  6. Step 6: Final answer
    x = 55,630.83

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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.