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Finding the Fourth Proportional to 70,999.60, 106,369.80 and 57,780.40

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Solution

The fourth proportional to 70,999.60, 106,369.80 and 57,780.40 is: 86,565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,999.60 : 106,369.80 = 57,780.40 : x
  2. Step 2: Convert to fraction form
    70,999.60/106,369.80 = 57,780.40/x
  3. Step 3: Cross multiply
    70,999.60x = 106,369.80 × 57,780.40
  4. Step 4: Simplify right side
    70,999.60x = 6,146,089,591.92
  5. Step 5: Solve for x
    x = 6,146,089,591.92/70,999.60
  6. Step 6: Final answer
    x = 86,565.13

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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.