Home / 128,492.02-177,319.56-71,899.75

Finding the Fourth Proportional to 128,492.02, 177,319.56 and 71,899.75

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Solution

The fourth proportional to 128,492.02, 177,319.56 and 71,899.75 is: 99,221.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,492.02 : 177,319.56 = 71,899.75 : x
  2. Step 2: Convert to fraction form
    128,492.02/177,319.56 = 71,899.75/x
  3. Step 3: Cross multiply
    128,492.02x = 177,319.56 × 71,899.75
  4. Step 4: Simplify right side
    128,492.02x = 12,749,232,034.11
  5. Step 5: Solve for x
    x = 12,749,232,034.11/128,492.02
  6. Step 6: Final answer
    x = 99,221.98

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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.