Home / 129,677.51-178,955.74-72,320.47

Finding the Fourth Proportional to 129,677.51, 178,955.74 and 72,320.47

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Solution

The fourth proportional to 129,677.51, 178,955.74 and 72,320.47 is: 99,802.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,677.51 : 178,955.74 = 72,320.47 : x
  2. Step 2: Convert to fraction form
    129,677.51/178,955.74 = 72,320.47/x
  3. Step 3: Cross multiply
    129,677.51x = 178,955.74 × 72,320.47
  4. Step 4: Simplify right side
    129,677.51x = 12,942,163,474.02
  5. Step 5: Solve for x
    x = 12,942,163,474.02/129,677.51
  6. Step 6: Final answer
    x = 99,802.69

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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.