Home / 315,741.87-435,730.05-172,510.79

Finding the Fourth Proportional to 315,741.87, 435,730.05 and 172,510.79

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Solution

The fourth proportional to 315,741.87, 435,730.05 and 172,510.79 is: 238,068.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,741.87 : 435,730.05 = 172,510.79 : x
  2. Step 2: Convert to fraction form
    315,741.87/435,730.05 = 172,510.79/x
  3. Step 3: Cross multiply
    315,741.87x = 435,730.05 × 172,510.79
  4. Step 4: Simplify right side
    315,741.87x = 75,168,132,973.59
  5. Step 5: Solve for x
    x = 75,168,132,973.59/315,741.87
  6. Step 6: Final answer
    x = 238,068.31

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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.