Home / 72,681.28-100,308.48-40,419.11

Finding the Fourth Proportional to 72,681.28, 100,308.48 and 40,419.11

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Solution

The fourth proportional to 72,681.28, 100,308.48 and 40,419.11 is: 55,783.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,681.28 : 100,308.48 = 40,419.11 : x
  2. Step 2: Convert to fraction form
    72,681.28/100,308.48 = 40,419.11/x
  3. Step 3: Cross multiply
    72,681.28x = 100,308.48 × 40,419.11
  4. Step 4: Simplify right side
    72,681.28x = 4,054,379,737.82
  5. Step 5: Solve for x
    x = 4,054,379,737.82/72,681.28
  6. Step 6: Final answer
    x = 55,783.00

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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.