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Finding the Fourth Proportional to 128,071.84, 176,741.08 and 71,487.52

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Solution

The fourth proportional to 128,071.84, 176,741.08 and 71,487.52 is: 98,653.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,071.84 : 176,741.08 = 71,487.52 : x
  2. Step 2: Convert to fraction form
    128,071.84/176,741.08 = 71,487.52/x
  3. Step 3: Cross multiply
    128,071.84x = 176,741.08 × 71,487.52
  4. Step 4: Simplify right side
    128,071.84x = 12,634,781,491.32
  5. Step 5: Solve for x
    x = 12,634,781,491.32/128,071.84
  6. Step 6: Final answer
    x = 98,653.86

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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.