Home / 100,730.07-139,004.55-55,408.02

Finding the Fourth Proportional to 100,730.07, 139,004.55 and 55,408.02

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Solution

The fourth proportional to 100,730.07, 139,004.55 and 55,408.02 is: 76,461.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,730.07 : 139,004.55 = 55,408.02 : x
  2. Step 2: Convert to fraction form
    100,730.07/139,004.55 = 55,408.02/x
  3. Step 3: Cross multiply
    100,730.07x = 139,004.55 × 55,408.02
  4. Step 4: Simplify right side
    100,730.07x = 7,701,966,886.49
  5. Step 5: Solve for x
    x = 7,701,966,886.49/100,730.07
  6. Step 6: Final answer
    x = 76,461.45

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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.