Home / 72,342.08-99,829.78-40,075.40

Finding the Fourth Proportional to 72,342.08, 99,829.78 and 40,075.40

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Solution

The fourth proportional to 72,342.08, 99,829.78 and 40,075.40 is: 55,302.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,342.08 : 99,829.78 = 40,075.40 : x
  2. Step 2: Convert to fraction form
    72,342.08/99,829.78 = 40,075.40/x
  3. Step 3: Cross multiply
    72,342.08x = 99,829.78 × 40,075.40
  4. Step 4: Simplify right side
    72,342.08x = 4,000,718,365.41
  5. Step 5: Solve for x
    x = 4,000,718,365.41/72,342.08
  6. Step 6: Final answer
    x = 55,302.78

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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.