Home / 72,143.09-99,557.26-40,312.02

Finding the Fourth Proportional to 72,143.09, 99,557.26 and 40,312.02

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Solution

The fourth proportional to 72,143.09, 99,557.26 and 40,312.02 is: 55,630.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.09 : 99,557.26 = 40,312.02 : x
  2. Step 2: Convert to fraction form
    72,143.09/99,557.26 = 40,312.02/x
  3. Step 3: Cross multiply
    72,143.09x = 99,557.26 × 40,312.02
  4. Step 4: Simplify right side
    72,143.09x = 4,013,354,054.71
  5. Step 5: Solve for x
    x = 4,013,354,054.71/72,143.09
  6. Step 6: Final answer
    x = 55,630.47

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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.