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Finding the Fourth Proportional to 128,293.80, 177,038.29 and 70,929.78

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Solution

The fourth proportional to 128,293.80, 177,038.29 and 70,929.78 is: 97,879.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,293.80 : 177,038.29 = 70,929.78 : x
  2. Step 2: Convert to fraction form
    128,293.80/177,038.29 = 70,929.78/x
  3. Step 3: Cross multiply
    128,293.80x = 177,038.29 × 70,929.78
  4. Step 4: Simplify right side
    128,293.80x = 12,557,286,961.28
  5. Step 5: Solve for x
    x = 12,557,286,961.28/128,293.80
  6. Step 6: Final answer
    x = 97,879.14

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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.