Home / 128,312.46-177,077.34-70,950.78

Finding the Fourth Proportional to 128,312.46, 177,077.34 and 70,950.78

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Solution

The fourth proportional to 128,312.46, 177,077.34 and 70,950.78 is: 97,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312.46 : 177,077.34 = 70,950.78 : x
  2. Step 2: Convert to fraction form
    128,312.46/177,077.34 = 70,950.78/x
  3. Step 3: Cross multiply
    128,312.46x = 177,077.34 × 70,950.78
  4. Step 4: Simplify right side
    128,312.46x = 12,563,775,393.33
  5. Step 5: Solve for x
    x = 12,563,775,393.33/128,312.46
  6. Step 6: Final answer
    x = 97,915.47

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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.