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Finding the Fourth Proportional to 65,737.78, 90,724.51 and 38,888.92

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Solution

The fourth proportional to 65,737.78, 90,724.51 and 38,888.92 is: 53,670.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,737.78 : 90,724.51 = 38,888.92 : x
  2. Step 2: Convert to fraction form
    65,737.78/90,724.51 = 38,888.92/x
  3. Step 3: Cross multiply
    65,737.78x = 90,724.51 × 38,888.92
  4. Step 4: Simplify right side
    65,737.78x = 3,528,178,373.45
  5. Step 5: Solve for x
    x = 3,528,178,373.45/65,737.78
  6. Step 6: Final answer
    x = 53,670.48

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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.