Home / 130,940.76-180,721.80-77,222.64

Finding the Fourth Proportional to 130,940.76, 180,721.80 and 77,222.64

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Solution

The fourth proportional to 130,940.76, 180,721.80 and 77,222.64 is: 106,581.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,940.76 : 180,721.80 = 77,222.64 : x
  2. Step 2: Convert to fraction form
    130,940.76/180,721.80 = 77,222.64/x
  3. Step 3: Cross multiply
    130,940.76x = 180,721.80 × 77,222.64
  4. Step 4: Simplify right side
    130,940.76x = 13,955,814,501.55
  5. Step 5: Solve for x
    x = 13,955,814,501.55/130,940.76
  6. Step 6: Final answer
    x = 106,581.13

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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.