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Finding the Fourth Proportional to 230,888.47, 318,623.07 and 128,915.67

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Solution

The fourth proportional to 230,888.47, 318,623.07 and 128,915.67 is: 177,901.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,888.47 : 318,623.07 = 128,915.67 : x
  2. Step 2: Convert to fraction form
    230,888.47/318,623.07 = 128,915.67/x
  3. Step 3: Cross multiply
    230,888.47x = 318,623.07 × 128,915.67
  4. Step 4: Simplify right side
    230,888.47x = 41,075,506,546.51
  5. Step 5: Solve for x
    x = 41,075,506,546.51/230,888.47
  6. Step 6: Final answer
    x = 177,901.94

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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.