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Finding the Fourth Proportional to 152,700.64, 210,726.48 and 85,634.08

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Solution

The fourth proportional to 152,700.64, 210,726.48 and 85,634.08 is: 118,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,700.64 : 210,726.48 = 85,634.08 : x
  2. Step 2: Convert to fraction form
    152,700.64/210,726.48 = 85,634.08/x
  3. Step 3: Cross multiply
    152,700.64x = 210,726.48 × 85,634.08
  4. Step 4: Simplify right side
    152,700.64x = 18,045,368,246.44
  5. Step 5: Solve for x
    x = 18,045,368,246.44/152,700.64
  6. Step 6: Final answer
    x = 118,174.80

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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.