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Finding the Fourth Proportional to 158,907.80, 219,294.18 and 87,289.28

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Solution

The fourth proportional to 158,907.80, 219,294.18 and 87,289.28 is: 120,459.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,907.80 : 219,294.18 = 87,289.28 : x
  2. Step 2: Convert to fraction form
    158,907.80/219,294.18 = 87,289.28/x
  3. Step 3: Cross multiply
    158,907.80x = 219,294.18 × 87,289.28
  4. Step 4: Simplify right side
    158,907.80x = 19,142,031,080.39
  5. Step 5: Solve for x
    x = 19,142,031,080.39/158,907.80
  6. Step 6: Final answer
    x = 120,459.98

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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.