Home / 129,681.95-178,960.75-72,321.34

Finding the Fourth Proportional to 129,681.95, 178,960.75 and 72,321.34

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Solution

The fourth proportional to 129,681.95, 178,960.75 and 72,321.34 is: 99,803.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.95 : 178,960.75 = 72,321.34 : x
  2. Step 2: Convert to fraction form
    129,681.95/178,960.75 = 72,321.34/x
  3. Step 3: Cross multiply
    129,681.95x = 178,960.75 × 72,321.34
  4. Step 4: Simplify right side
    129,681.95x = 12,942,680,678.01
  5. Step 5: Solve for x
    x = 12,942,680,678.01/129,681.95
  6. Step 6: Final answer
    x = 99,803.25

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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.