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Finding the Fourth Proportional to 128,255.95, 176,992.14 and 70,899.04

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Solution

The fourth proportional to 128,255.95, 176,992.14 and 70,899.04 is: 97,840.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,255.95 : 176,992.14 = 70,899.04 : x
  2. Step 2: Convert to fraction form
    128,255.95/176,992.14 = 70,899.04/x
  3. Step 3: Cross multiply
    128,255.95x = 176,992.14 × 70,899.04
  4. Step 4: Simplify right side
    128,255.95x = 12,548,572,813.55
  5. Step 5: Solve for x
    x = 12,548,572,813.55/128,255.95
  6. Step 6: Final answer
    x = 97,840.08

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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.