Home / 128,875.23-177,848.79-71,514.78

Finding the Fourth Proportional to 128,875.23, 177,848.79 and 71,514.78

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Solution

The fourth proportional to 128,875.23, 177,848.79 and 71,514.78 is: 98,690.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,875.23 : 177,848.79 = 71,514.78 : x
  2. Step 2: Convert to fraction form
    128,875.23/177,848.79 = 71,514.78/x
  3. Step 3: Cross multiply
    128,875.23x = 177,848.79 × 71,514.78
  4. Step 4: Simplify right side
    128,875.23x = 12,718,817,090.12
  5. Step 5: Solve for x
    x = 12,718,817,090.12/128,875.23
  6. Step 6: Final answer
    x = 98,690.94

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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.