Home / 129,315.69-178,428.89-75,590.31

Finding the Fourth Proportional to 129,315.69, 178,428.89 and 75,590.31

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Solution

The fourth proportional to 129,315.69, 178,428.89 and 75,590.31 is: 104,298.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,315.69 : 178,428.89 = 75,590.31 : x
  2. Step 2: Convert to fraction form
    129,315.69/178,428.89 = 75,590.31/x
  3. Step 3: Cross multiply
    129,315.69x = 178,428.89 × 75,590.31
  4. Step 4: Simplify right side
    129,315.69x = 13,487,495,108.06
  5. Step 5: Solve for x
    x = 13,487,495,108.06/129,315.69
  6. Step 6: Final answer
    x = 104,298.98

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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.