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Finding the Fourth Proportional to 209,030.40, 313,574.40 and 90,698.40

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Solution

The fourth proportional to 209,030.40, 313,574.40 and 90,698.40 is: 136,060.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,030.40 : 313,574.40 = 90,698.40 : x
  2. Step 2: Convert to fraction form
    209,030.40/313,574.40 = 90,698.40/x
  3. Step 3: Cross multiply
    209,030.40x = 313,574.40 × 90,698.40
  4. Step 4: Simplify right side
    209,030.40x = 28,440,696,360.96
  5. Step 5: Solve for x
    x = 28,440,696,360.96/209,030.40
  6. Step 6: Final answer
    x = 136,060.10

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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.