Home / 130,811.86-180,498.64-77,089.58

Finding the Fourth Proportional to 130,811.86, 180,498.64 and 77,089.58

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Solution

The fourth proportional to 130,811.86, 180,498.64 and 77,089.58 is: 106,370.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,811.86 : 180,498.64 = 77,089.58 : x
  2. Step 2: Convert to fraction form
    130,811.86/180,498.64 = 77,089.58/x
  3. Step 3: Cross multiply
    130,811.86x = 180,498.64 × 77,089.58
  4. Step 4: Simplify right side
    130,811.86x = 13,914,564,348.17
  5. Step 5: Solve for x
    x = 13,914,564,348.17/130,811.86
  6. Step 6: Final answer
    x = 106,370.82

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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.