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Finding the Fourth Proportional to 128,145.94, 176,841.74 and 70,784.24

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Solution

The fourth proportional to 128,145.94, 176,841.74 and 70,784.24 is: 97,682.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.94 : 176,841.74 = 70,784.24 : x
  2. Step 2: Convert to fraction form
    128,145.94/176,841.74 = 70,784.24/x
  3. Step 3: Cross multiply
    128,145.94x = 176,841.74 × 70,784.24
  4. Step 4: Simplify right side
    128,145.94x = 12,517,607,458.93
  5. Step 5: Solve for x
    x = 12,517,607,458.93/128,145.94
  6. Step 6: Final answer
    x = 97,682.44

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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.