Home / 71,838.12-99,129.51-40,009.98

Finding the Fourth Proportional to 71,838.12, 99,129.51 and 40,009.98

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Solution

The fourth proportional to 71,838.12, 99,129.51 and 40,009.98 is: 55,209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,838.12 : 99,129.51 = 40,009.98 : x
  2. Step 2: Convert to fraction form
    71,838.12/99,129.51 = 40,009.98/x
  3. Step 3: Cross multiply
    71,838.12x = 99,129.51 × 40,009.98
  4. Step 4: Simplify right side
    71,838.12x = 3,966,169,712.51
  5. Step 5: Solve for x
    x = 3,966,169,712.51/71,838.12
  6. Step 6: Final answer
    x = 55,209.82

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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.