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Finding the Fourth Proportional to 128,306.84, 177,062.37 and 70,948.67

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Solution

The fourth proportional to 128,306.84, 177,062.37 and 70,948.67 is: 97,908.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,306.84 : 177,062.37 = 70,948.67 : x
  2. Step 2: Convert to fraction form
    128,306.84/177,062.37 = 70,948.67/x
  3. Step 3: Cross multiply
    128,306.84x = 177,062.37 × 70,948.67
  4. Step 4: Simplify right side
    128,306.84x = 12,562,338,773.24
  5. Step 5: Solve for x
    x = 12,562,338,773.24/128,306.84
  6. Step 6: Final answer
    x = 97,908.57

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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.