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Finding the Fourth Proportional to 124,580.40, 186,870.60 and 86,526.60

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Solution

The fourth proportional to 124,580.40, 186,870.60 and 86,526.60 is: 129,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,580.40 : 186,870.60 = 86,526.60 : x
  2. Step 2: Convert to fraction form
    124,580.40/186,870.60 = 86,526.60/x
  3. Step 3: Cross multiply
    124,580.40x = 186,870.60 × 86,526.60
  4. Step 4: Simplify right side
    124,580.40x = 16,169,277,657.96
  5. Step 5: Solve for x
    x = 16,169,277,657.96/124,580.40
  6. Step 6: Final answer
    x = 129,789.90

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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.