Home / 128,028.36-176,670-70,656.24

Finding the Fourth Proportional to 128,028.36, 176,670 and 70,656.24

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Solution

The fourth proportional to 128,028.36, 176,670 and 70,656.24 is: 97,500.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,028.36 : 176,670 = 70,656.24 : x
  2. Step 2: Convert to fraction form
    128,028.36/176,670 = 70,656.24/x
  3. Step 3: Cross multiply
    128,028.36x = 176,670 × 70,656.24
  4. Step 4: Simplify right side
    128,028.36x = 12,482,837,920.80
  5. Step 5: Solve for x
    x = 12,482,837,920.80/128,028.36
  6. Step 6: Final answer
    x = 97,500.57

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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.