Home / 129,014.84-178,030.65-72,415.28

Finding the Fourth Proportional to 129,014.84, 178,030.65 and 72,415.28

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Solution

The fourth proportional to 129,014.84, 178,030.65 and 72,415.28 is: 99,927.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,014.84 : 178,030.65 = 72,415.28 : x
  2. Step 2: Convert to fraction form
    129,014.84/178,030.65 = 72,415.28/x
  3. Step 3: Cross multiply
    129,014.84x = 178,030.65 × 72,415.28
  4. Step 4: Simplify right side
    129,014.84x = 12,892,139,368.33
  5. Step 5: Solve for x
    x = 12,892,139,368.33/129,014.84
  6. Step 6: Final answer
    x = 99,927.57

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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.