Home / 149,130.47-205,802.50-81,147.79

Finding the Fourth Proportional to 149,130.47, 205,802.50 and 81,147.79

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Solution

The fourth proportional to 149,130.47, 205,802.50 and 81,147.79 is: 111,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,130.47 : 205,802.50 = 81,147.79 : x
  2. Step 2: Convert to fraction form
    149,130.47/205,802.50 = 81,147.79/x
  3. Step 3: Cross multiply
    149,130.47x = 205,802.50 × 81,147.79
  4. Step 4: Simplify right side
    149,130.47x = 16,700,417,022.46
  5. Step 5: Solve for x
    x = 16,700,417,022.46/149,130.47
  6. Step 6: Final answer
    x = 111,985.28

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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.