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Finding the Fourth Proportional to 76,980.04, 106,230.42 and 42,987.58

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Solution

The fourth proportional to 76,980.04, 106,230.42 and 42,987.58 is: 59,321.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,980.04 : 106,230.42 = 42,987.58 : x
  2. Step 2: Convert to fraction form
    76,980.04/106,230.42 = 42,987.58/x
  3. Step 3: Cross multiply
    76,980.04x = 106,230.42 × 42,987.58
  4. Step 4: Simplify right side
    76,980.04x = 4,566,588,678.18
  5. Step 5: Solve for x
    x = 4,566,588,678.18/76,980.04
  6. Step 6: Final answer
    x = 59,321.72

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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.