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Finding the Fourth Proportional to 115,605, 173,407.50 and 28,053

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Solution

The fourth proportional to 115,605, 173,407.50 and 28,053 is: 42,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,605 : 173,407.50 = 28,053 : x
  2. Step 2: Convert to fraction form
    115,605/173,407.50 = 28,053/x
  3. Step 3: Cross multiply
    115,605x = 173,407.50 × 28,053
  4. Step 4: Simplify right side
    115,605x = 4,864,600,597.50
  5. Step 5: Solve for x
    x = 4,864,600,597.50/115,605
  6. Step 6: Final answer
    x = 42,079.50

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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.