Home / 129,774.17-179,088.84-72,415.91

Finding the Fourth Proportional to 129,774.17, 179,088.84 and 72,415.91

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Solution

The fourth proportional to 129,774.17, 179,088.84 and 72,415.91 is: 99,934.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,774.17 : 179,088.84 = 72,415.91 : x
  2. Step 2: Convert to fraction form
    129,774.17/179,088.84 = 72,415.91/x
  3. Step 3: Cross multiply
    129,774.17x = 179,088.84 × 72,415.91
  4. Step 4: Simplify right side
    129,774.17x = 12,968,880,424.00
  5. Step 5: Solve for x
    x = 12,968,880,424.00/129,774.17
  6. Step 6: Final answer
    x = 99,934.22

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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.