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Finding the Fourth Proportional to 153,660, 212,050.80 and 86,594.40

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Solution

The fourth proportional to 153,660, 212,050.80 and 86,594.40 is: 119,500.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,660 : 212,050.80 = 86,594.40 : x
  2. Step 2: Convert to fraction form
    153,660/212,050.80 = 86,594.40/x
  3. Step 3: Cross multiply
    153,660x = 212,050.80 × 86,594.40
  4. Step 4: Simplify right side
    153,660x = 18,362,411,795.52
  5. Step 5: Solve for x
    x = 18,362,411,795.52/153,660
  6. Step 6: Final answer
    x = 119,500.27

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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.