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Finding the Fourth Proportional to 124,809.60, 186,847.20 and 77,920.32

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Solution

The fourth proportional to 124,809.60, 186,847.20 and 77,920.32 is: 116,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,809.60 : 186,847.20 = 77,920.32 : x
  2. Step 2: Convert to fraction form
    124,809.60/186,847.20 = 77,920.32/x
  3. Step 3: Cross multiply
    124,809.60x = 186,847.20 × 77,920.32
  4. Step 4: Simplify right side
    124,809.60x = 14,559,193,615.10
  5. Step 5: Solve for x
    x = 14,559,193,615.10/124,809.60
  6. Step 6: Final answer
    x = 116,651.23

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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.