Home / 100,751.02-139,036.40-55,428.02

Finding the Fourth Proportional to 100,751.02, 139,036.40 and 55,428.02

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Solution

The fourth proportional to 100,751.02, 139,036.40 and 55,428.02 is: 76,490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.02 : 139,036.40 = 55,428.02 : x
  2. Step 2: Convert to fraction form
    100,751.02/139,036.40 = 55,428.02/x
  3. Step 3: Cross multiply
    100,751.02x = 139,036.40 × 55,428.02
  4. Step 4: Simplify right side
    100,751.02x = 7,706,512,638.23
  5. Step 5: Solve for x
    x = 7,706,512,638.23/100,751.02
  6. Step 6: Final answer
    x = 76,490.67

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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.