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Finding the Fourth Proportional to 102,151.58, 140,973.75 and 85,127.34

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Solution

The fourth proportional to 102,151.58, 140,973.75 and 85,127.34 is: 117,479.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,151.58 : 140,973.75 = 85,127.34 : x
  2. Step 2: Convert to fraction form
    102,151.58/140,973.75 = 85,127.34/x
  3. Step 3: Cross multiply
    102,151.58x = 140,973.75 × 85,127.34
  4. Step 4: Simplify right side
    102,151.58x = 12,000,720,083.00
  5. Step 5: Solve for x
    x = 12,000,720,083.00/102,151.58
  6. Step 6: Final answer
    x = 117,479.53

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1.5x scale

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.