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Finding the Fourth Proportional to 145,062, 217,710 and 74,961.36

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Solution

The fourth proportional to 145,062, 217,710 and 74,961.36 is: 112,502.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,062 : 217,710 = 74,961.36 : x
  2. Step 2: Convert to fraction form
    145,062/217,710 = 74,961.36/x
  3. Step 3: Cross multiply
    145,062x = 217,710 × 74,961.36
  4. Step 4: Simplify right side
    145,062x = 16,319,837,685.60
  5. Step 5: Solve for x
    x = 16,319,837,685.60/145,062
  6. Step 6: Final answer
    x = 112,502.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.