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Finding the Fourth Proportional to 189,038.72, 260,885.04 and 104,155.76

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Solution

The fourth proportional to 189,038.72, 260,885.04 and 104,155.76 is: 143,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,038.72 : 260,885.04 = 104,155.76 : x
  2. Step 2: Convert to fraction form
    189,038.72/260,885.04 = 104,155.76/x
  3. Step 3: Cross multiply
    189,038.72x = 260,885.04 × 104,155.76
  4. Step 4: Simplify right side
    189,038.72x = 27,172,679,613.83
  5. Step 5: Solve for x
    x = 27,172,679,613.83/189,038.72
  6. Step 6: Final answer
    x = 143,741.34

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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.