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Finding the Fourth Proportional to 128,298.47, 177,044.74 and 70,934.47

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Solution

The fourth proportional to 128,298.47, 177,044.74 and 70,934.47 is: 97,885.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,298.47 : 177,044.74 = 70,934.47 : x
  2. Step 2: Convert to fraction form
    128,298.47/177,044.74 = 70,934.47/x
  3. Step 3: Cross multiply
    128,298.47x = 177,044.74 × 70,934.47
  4. Step 4: Simplify right side
    128,298.47x = 12,558,574,798.19
  5. Step 5: Solve for x
    x = 12,558,574,798.19/128,298.47
  6. Step 6: Final answer
    x = 97,885.62

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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.