Home / 72,143.25-99,557.38-40,312.15

Finding the Fourth Proportional to 72,143.25, 99,557.38 and 40,312.15

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Solution

The fourth proportional to 72,143.25, 99,557.38 and 40,312.15 is: 55,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.25 : 99,557.38 = 40,312.15 : x
  2. Step 2: Convert to fraction form
    72,143.25/99,557.38 = 40,312.15/x
  3. Step 3: Cross multiply
    72,143.25x = 99,557.38 × 40,312.15
  4. Step 4: Simplify right side
    72,143.25x = 4,013,371,724.29
  5. Step 5: Solve for x
    x = 4,013,371,724.29/72,143.25
  6. Step 6: Final answer
    x = 55,630.59

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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.