Home / 128,240.20-176,980.63-70,878.28

Finding the Fourth Proportional to 128,240.20, 176,980.63 and 70,878.28

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Solution

The fourth proportional to 128,240.20, 176,980.63 and 70,878.28 is: 97,817.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,240.20 : 176,980.63 = 70,878.28 : x
  2. Step 2: Convert to fraction form
    128,240.20/176,980.63 = 70,878.28/x
  3. Step 3: Cross multiply
    128,240.20x = 176,980.63 × 70,878.28
  4. Step 4: Simplify right side
    128,240.20x = 12,544,082,647.72
  5. Step 5: Solve for x
    x = 12,544,082,647.72/128,240.20
  6. Step 6: Final answer
    x = 97,817.09

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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.