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Finding the Fourth Proportional to 152,806.80, 229,210.20 and 139,028.70

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Solution

The fourth proportional to 152,806.80, 229,210.20 and 139,028.70 is: 208,543.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,806.80 : 229,210.20 = 139,028.70 : x
  2. Step 2: Convert to fraction form
    152,806.80/229,210.20 = 139,028.70/x
  3. Step 3: Cross multiply
    152,806.80x = 229,210.20 × 139,028.70
  4. Step 4: Simplify right side
    152,806.80x = 31,866,796,132.74
  5. Step 5: Solve for x
    x = 31,866,796,132.74/152,806.80
  6. Step 6: Final answer
    x = 208,543.05

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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.