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Finding the Fourth Proportional to 128,066.49, 176,741.87 and 74,368.35

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Solution

The fourth proportional to 128,066.49, 176,741.87 and 74,368.35 is: 102,634.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.49 : 176,741.87 = 74,368.35 : x
  2. Step 2: Convert to fraction form
    128,066.49/176,741.87 = 74,368.35/x
  3. Step 3: Cross multiply
    128,066.49x = 176,741.87 × 74,368.35
  4. Step 4: Simplify right side
    128,066.49x = 13,144,000,875.97
  5. Step 5: Solve for x
    x = 13,144,000,875.97/128,066.49
  6. Step 6: Final answer
    x = 102,634.19

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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.