Home / 289,400.10-434,130.21-79,038

Finding the Fourth Proportional to 289,400.10, 434,130.21 and 79,038

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Solution

The fourth proportional to 289,400.10, 434,130.21 and 79,038 is: 118,565.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,400.10 : 434,130.21 = 79,038 : x
  2. Step 2: Convert to fraction form
    289,400.10/434,130.21 = 79,038/x
  3. Step 3: Cross multiply
    289,400.10x = 434,130.21 × 79,038
  4. Step 4: Simplify right side
    289,400.10x = 34,312,783,537.98
  5. Step 5: Solve for x
    x = 34,312,783,537.98/289,400.10
  6. Step 6: Final answer
    x = 118,565.21

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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.