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Finding the Fourth Proportional to 112,638.48, 155,458.56 and 64,240.48

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Solution

The fourth proportional to 112,638.48, 155,458.56 and 64,240.48 is: 88,661.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,638.48 : 155,458.56 = 64,240.48 : x
  2. Step 2: Convert to fraction form
    112,638.48/155,458.56 = 64,240.48/x
  3. Step 3: Cross multiply
    112,638.48x = 155,458.56 × 64,240.48
  4. Step 4: Simplify right side
    112,638.48x = 9,986,732,514.51
  5. Step 5: Solve for x
    x = 9,986,732,514.51/112,638.48
  6. Step 6: Final answer
    x = 88,661.82

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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.