Home / 189,885.15-284,578.56-139,730.40

Finding the Fourth Proportional to 189,885.15, 284,578.56 and 139,730.40

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Solution

The fourth proportional to 189,885.15, 284,578.56 and 139,730.40 is: 209,412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,885.15 : 284,578.56 = 139,730.40 : x
  2. Step 2: Convert to fraction form
    189,885.15/284,578.56 = 139,730.40/x
  3. Step 3: Cross multiply
    189,885.15x = 284,578.56 × 139,730.40
  4. Step 4: Simplify right side
    189,885.15x = 39,764,276,020.22
  5. Step 5: Solve for x
    x = 39,764,276,020.22/189,885.15
  6. Step 6: Final answer
    x = 209,412.25

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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.