Home / 72,342.64-99,828-40,075.07

Finding the Fourth Proportional to 72,342.64, 99,828 and 40,075.07

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Solution

The fourth proportional to 72,342.64, 99,828 and 40,075.07 is: 55,300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,342.64 : 99,828 = 40,075.07 : x
  2. Step 2: Convert to fraction form
    72,342.64/99,828 = 40,075.07/x
  3. Step 3: Cross multiply
    72,342.64x = 99,828 × 40,075.07
  4. Step 4: Simplify right side
    72,342.64x = 4,000,614,087.96
  5. Step 5: Solve for x
    x = 4,000,614,087.96/72,342.64
  6. Step 6: Final answer
    x = 55,300.91

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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.