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Finding the Fourth Proportional to 72,989.57, 100,726.92 and 42,783.45

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Solution

The fourth proportional to 72,989.57, 100,726.92 and 42,783.45 is: 59,041.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,989.57 : 100,726.92 = 42,783.45 : x
  2. Step 2: Convert to fraction form
    72,989.57/100,726.92 = 42,783.45/x
  3. Step 3: Cross multiply
    72,989.57x = 100,726.92 × 42,783.45
  4. Step 4: Simplify right side
    72,989.57x = 4,309,445,145.47
  5. Step 5: Solve for x
    x = 4,309,445,145.47/72,989.57
  6. Step 6: Final answer
    x = 59,041.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.