Home / 128,368.01-177,154.07-71,007.08

Finding the Fourth Proportional to 128,368.01, 177,154.07 and 71,007.08

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Solution

The fourth proportional to 128,368.01, 177,154.07 and 71,007.08 is: 97,993.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.01 : 177,154.07 = 71,007.08 : x
  2. Step 2: Convert to fraction form
    128,368.01/177,154.07 = 71,007.08/x
  3. Step 3: Cross multiply
    128,368.01x = 177,154.07 × 71,007.08
  4. Step 4: Simplify right side
    128,368.01x = 12,579,193,220.82
  5. Step 5: Solve for x
    x = 12,579,193,220.82/128,368.01
  6. Step 6: Final answer
    x = 97,993.21

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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.