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Finding the Fourth Proportional to 188,813.68, 260,618 and 112,386.40

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Solution

The fourth proportional to 188,813.68, 260,618 and 112,386.40 is: 155,126.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,813.68 : 260,618 = 112,386.40 : x
  2. Step 2: Convert to fraction form
    188,813.68/260,618 = 112,386.40/x
  3. Step 3: Cross multiply
    188,813.68x = 260,618 × 112,386.40
  4. Step 4: Simplify right side
    188,813.68x = 29,289,918,795.20
  5. Step 5: Solve for x
    x = 29,289,918,795.20/188,813.68
  6. Step 6: Final answer
    x = 155,126.04

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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.