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Finding the Fourth Proportional to 128,502.95, 177,389.67 and 96,679.67

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Solution

The fourth proportional to 128,502.95, 177,389.67 and 96,679.67 is: 133,459.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,502.95 : 177,389.67 = 96,679.67 : x
  2. Step 2: Convert to fraction form
    128,502.95/177,389.67 = 96,679.67/x
  3. Step 3: Cross multiply
    128,502.95x = 177,389.67 × 96,679.67
  4. Step 4: Simplify right side
    128,502.95x = 17,149,973,870.06
  5. Step 5: Solve for x
    x = 17,149,973,870.06/128,502.95
  6. Step 6: Final answer
    x = 133,459.77

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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.