Home / 130,915.92-180,655.32-77,198.40

Finding the Fourth Proportional to 130,915.92, 180,655.32 and 77,198.40

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Solution

The fourth proportional to 130,915.92, 180,655.32 and 77,198.40 is: 106,528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,915.92 : 180,655.32 = 77,198.40 : x
  2. Step 2: Convert to fraction form
    130,915.92/180,655.32 = 77,198.40/x
  3. Step 3: Cross multiply
    130,915.92x = 180,655.32 × 77,198.40
  4. Step 4: Simplify right side
    130,915.92x = 13,946,301,655.49
  5. Step 5: Solve for x
    x = 13,946,301,655.49/130,915.92
  6. Step 6: Final answer
    x = 106,528.69

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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.