Home / 129,803.12-179,130.64-76,126.86

Finding the Fourth Proportional to 129,803.12, 179,130.64 and 76,126.86

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Solution

The fourth proportional to 129,803.12, 179,130.64 and 76,126.86 is: 105,056.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,803.12 : 179,130.64 = 76,126.86 : x
  2. Step 2: Convert to fraction form
    129,803.12/179,130.64 = 76,126.86/x
  3. Step 3: Cross multiply
    129,803.12x = 179,130.64 × 76,126.86
  4. Step 4: Simplify right side
    129,803.12x = 13,636,653,152.99
  5. Step 5: Solve for x
    x = 13,636,653,152.99/129,803.12
  6. Step 6: Final answer
    x = 105,056.44

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1.5x scale

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.