Home / 129,087.81-178,140.06-70,945.20

Finding the Fourth Proportional to 129,087.81, 178,140.06 and 70,945.20

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Solution

The fourth proportional to 129,087.81, 178,140.06 and 70,945.20 is: 97,903.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,087.81 : 178,140.06 = 70,945.20 : x
  2. Step 2: Convert to fraction form
    129,087.81/178,140.06 = 70,945.20/x
  3. Step 3: Cross multiply
    129,087.81x = 178,140.06 × 70,945.20
  4. Step 4: Simplify right side
    129,087.81x = 12,638,182,184.71
  5. Step 5: Solve for x
    x = 12,638,182,184.71/129,087.81
  6. Step 6: Final answer
    x = 97,903.76

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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.