Home / 91,139.03-136,707.73-28,809.55

Finding the Fourth Proportional to 91,139.03, 136,707.73 and 28,809.55

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Solution

The fourth proportional to 91,139.03, 136,707.73 and 28,809.55 is: 43,214.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,139.03 : 136,707.73 = 28,809.55 : x
  2. Step 2: Convert to fraction form
    91,139.03/136,707.73 = 28,809.55/x
  3. Step 3: Cross multiply
    91,139.03x = 136,707.73 × 28,809.55
  4. Step 4: Simplify right side
    91,139.03x = 3,938,488,038.77
  5. Step 5: Solve for x
    x = 3,938,488,038.77/91,139.03
  6. Step 6: Final answer
    x = 43,214.07

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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.