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Finding the Fourth Proportional to 128,677.79, 192,938.77 and 57,587.19

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Solution

The fourth proportional to 128,677.79, 192,938.77 and 57,587.19 is: 86,345.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,677.79 : 192,938.77 = 57,587.19 : x
  2. Step 2: Convert to fraction form
    128,677.79/192,938.77 = 57,587.19/x
  3. Step 3: Cross multiply
    128,677.79x = 192,938.77 × 57,587.19
  4. Step 4: Simplify right side
    128,677.79x = 11,110,800,980.04
  5. Step 5: Solve for x
    x = 11,110,800,980.04/128,677.79
  6. Step 6: Final answer
    x = 86,345.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.