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Finding the Fourth Proportional to 92,888.71, 128,239.55 and 61,149.87

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Solution

The fourth proportional to 92,888.71, 128,239.55 and 61,149.87 is: 84,421.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,888.71 : 128,239.55 = 61,149.87 : x
  2. Step 2: Convert to fraction form
    92,888.71/128,239.55 = 61,149.87/x
  3. Step 3: Cross multiply
    92,888.71x = 128,239.55 × 61,149.87
  4. Step 4: Simplify right side
    92,888.71x = 7,841,830,864.41
  5. Step 5: Solve for x
    x = 7,841,830,864.41/92,888.71
  6. Step 6: Final answer
    x = 84,421.79

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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.