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Finding the Fourth Proportional to 156,130, 215,400.60 and 102,444.64

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Solution

The fourth proportional to 156,130, 215,400.60 and 102,444.64 is: 141,335.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,130 : 215,400.60 = 102,444.64 : x
  2. Step 2: Convert to fraction form
    156,130/215,400.60 = 102,444.64/x
  3. Step 3: Cross multiply
    156,130x = 215,400.60 × 102,444.64
  4. Step 4: Simplify right side
    156,130x = 22,066,636,922.78
  5. Step 5: Solve for x
    x = 22,066,636,922.78/156,130
  6. Step 6: Final answer
    x = 141,335.02

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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.