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Finding the Fourth Proportional to 158,012.72, 218,072.07 and 90,038.93

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Solution

The fourth proportional to 158,012.72, 218,072.07 and 90,038.93 is: 124,262.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,012.72 : 218,072.07 = 90,038.93 : x
  2. Step 2: Convert to fraction form
    158,012.72/218,072.07 = 90,038.93/x
  3. Step 3: Cross multiply
    158,012.72x = 218,072.07 × 90,038.93
  4. Step 4: Simplify right side
    158,012.72x = 19,634,975,845.69
  5. Step 5: Solve for x
    x = 19,634,975,845.69/158,012.72
  6. Step 6: Final answer
    x = 124,262.00

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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.