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Finding the Fourth Proportional to 48,737.80, 72,960.90 and 42,905.80

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Solution

The fourth proportional to 48,737.80, 72,960.90 and 42,905.80 is: 64,230.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,737.80 : 72,960.90 = 42,905.80 : x
  2. Step 2: Convert to fraction form
    48,737.80/72,960.90 = 42,905.80/x
  3. Step 3: Cross multiply
    48,737.80x = 72,960.90 × 42,905.80
  4. Step 4: Simplify right side
    48,737.80x = 3,130,445,783.22
  5. Step 5: Solve for x
    x = 3,130,445,783.22/48,737.80
  6. Step 6: Final answer
    x = 64,230.35

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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.