Home / 156,741.14-215,811.12-138,325.40

Finding the Fourth Proportional to 156,741.14, 215,811.12 and 138,325.40

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Solution

The fourth proportional to 156,741.14, 215,811.12 and 138,325.40 is: 190,455.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,741.14 : 215,811.12 = 138,325.40 : x
  2. Step 2: Convert to fraction form
    156,741.14/215,811.12 = 138,325.40/x
  3. Step 3: Cross multiply
    156,741.14x = 215,811.12 × 138,325.40
  4. Step 4: Simplify right side
    156,741.14x = 29,852,159,498.45
  5. Step 5: Solve for x
    x = 29,852,159,498.45/156,741.14
  6. Step 6: Final answer
    x = 190,455.16

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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.