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Finding the Fourth Proportional to 71,148.49, 98,188.70 and 40,938.40

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Solution

The fourth proportional to 71,148.49, 98,188.70 and 40,938.40 is: 56,497.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,148.49 : 98,188.70 = 40,938.40 : x
  2. Step 2: Convert to fraction form
    71,148.49/98,188.70 = 40,938.40/x
  3. Step 3: Cross multiply
    71,148.49x = 98,188.70 × 40,938.40
  4. Step 4: Simplify right side
    71,148.49x = 4,019,688,071.39
  5. Step 5: Solve for x
    x = 4,019,688,071.39/71,148.49
  6. Step 6: Final answer
    x = 56,497.17

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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.