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Finding the Fourth Proportional to 98,795.76, 136,368.81 and 56,382.54

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Solution

The fourth proportional to 98,795.76, 136,368.81 and 56,382.54 is: 77,825.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,795.76 : 136,368.81 = 56,382.54 : x
  2. Step 2: Convert to fraction form
    98,795.76/136,368.81 = 56,382.54/x
  3. Step 3: Cross multiply
    98,795.76x = 136,368.81 × 56,382.54
  4. Step 4: Simplify right side
    98,795.76x = 7,688,819,884.58
  5. Step 5: Solve for x
    x = 7,688,819,884.58/98,795.76
  6. Step 6: Final answer
    x = 77,825.40

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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.