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Finding the Fourth Proportional to 157,681.60, 217,605.66 and 89,696.80

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Solution

The fourth proportional to 157,681.60, 217,605.66 and 89,696.80 is: 123,784.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,681.60 : 217,605.66 = 89,696.80 : x
  2. Step 2: Convert to fraction form
    157,681.60/217,605.66 = 89,696.80/x
  3. Step 3: Cross multiply
    157,681.60x = 217,605.66 × 89,696.80
  4. Step 4: Simplify right side
    157,681.60x = 19,518,531,363.89
  5. Step 5: Solve for x
    x = 19,518,531,363.89/157,681.60
  6. Step 6: Final answer
    x = 123,784.46

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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.