Home / 128,302.48-177,058.02-71,712.64

Finding the Fourth Proportional to 128,302.48, 177,058.02 and 71,712.64

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Solution

The fourth proportional to 128,302.48, 177,058.02 and 71,712.64 is: 98,963.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,302.48 : 177,058.02 = 71,712.64 : x
  2. Step 2: Convert to fraction form
    128,302.48/177,058.02 = 71,712.64/x
  3. Step 3: Cross multiply
    128,302.48x = 177,058.02 × 71,712.64
  4. Step 4: Simplify right side
    128,302.48x = 12,697,298,047.37
  5. Step 5: Solve for x
    x = 12,697,298,047.37/128,302.48
  6. Step 6: Final answer
    x = 98,963.78

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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.