Home / 100,746.16-139,031.40-55,427.92

Finding the Fourth Proportional to 100,746.16, 139,031.40 and 55,427.92

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Solution

The fourth proportional to 100,746.16, 139,031.40 and 55,427.92 is: 76,491.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,746.16 : 139,031.40 = 55,427.92 : x
  2. Step 2: Convert to fraction form
    100,746.16/139,031.40 = 55,427.92/x
  3. Step 3: Cross multiply
    100,746.16x = 139,031.40 × 55,427.92
  4. Step 4: Simplify right side
    100,746.16x = 7,706,221,316.69
  5. Step 5: Solve for x
    x = 7,706,221,316.69/100,746.16
  6. Step 6: Final answer
    x = 76,491.46

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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.