Home / 100,730.04-139,010.76-55,411.50

Finding the Fourth Proportional to 100,730.04, 139,010.76 and 55,411.50

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Solution

The fourth proportional to 100,730.04, 139,010.76 and 55,411.50 is: 76,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,730.04 : 139,010.76 = 55,411.50 : x
  2. Step 2: Convert to fraction form
    100,730.04/139,010.76 = 55,411.50/x
  3. Step 3: Cross multiply
    100,730.04x = 139,010.76 × 55,411.50
  4. Step 4: Simplify right side
    100,730.04x = 7,702,794,727.74
  5. Step 5: Solve for x
    x = 7,702,794,727.74/100,730.04
  6. Step 6: Final answer
    x = 76,469.69

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1.5x scale

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.