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Finding the Fourth Proportional to 59,980.20, 89,970.30 and 57,420.60

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Solution

The fourth proportional to 59,980.20, 89,970.30 and 57,420.60 is: 86,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,980.20 : 89,970.30 = 57,420.60 : x
  2. Step 2: Convert to fraction form
    59,980.20/89,970.30 = 57,420.60/x
  3. Step 3: Cross multiply
    59,980.20x = 89,970.30 × 57,420.60
  4. Step 4: Simplify right side
    59,980.20x = 5,166,148,608.18
  5. Step 5: Solve for x
    x = 5,166,148,608.18/59,980.20
  6. Step 6: Final answer
    x = 86,130.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.