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Finding the Fourth Proportional to 90,783.60, 136,133.80 and 48,657.20

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Solution

The fourth proportional to 90,783.60, 136,133.80 and 48,657.20 is: 72,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.60 : 136,133.80 = 48,657.20 : x
  2. Step 2: Convert to fraction form
    90,783.60/136,133.80 = 48,657.20/x
  3. Step 3: Cross multiply
    90,783.60x = 136,133.80 × 48,657.20
  4. Step 4: Simplify right side
    90,783.60x = 6,623,889,533.36
  5. Step 5: Solve for x
    x = 6,623,889,533.36/90,783.60
  6. Step 6: Final answer
    x = 72,963.50

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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.