Home / 130,880.40-180,612.36-77,167.68

Finding the Fourth Proportional to 130,880.40, 180,612.36 and 77,167.68

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Solution

The fourth proportional to 130,880.40, 180,612.36 and 77,167.68 is: 106,489.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,880.40 : 180,612.36 = 77,167.68 : x
  2. Step 2: Convert to fraction form
    130,880.40/180,612.36 = 77,167.68/x
  3. Step 3: Cross multiply
    130,880.40x = 180,612.36 × 77,167.68
  4. Step 4: Simplify right side
    130,880.40x = 13,937,436,800.52
  5. Step 5: Solve for x
    x = 13,937,436,800.52/130,880.40
  6. Step 6: Final answer
    x = 106,489.87

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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.