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Finding the Fourth Proportional to 65,484.94, 90,345.54 and 42,836.86

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Solution

The fourth proportional to 65,484.94, 90,345.54 and 42,836.86 is: 59,099.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,484.94 : 90,345.54 = 42,836.86 : x
  2. Step 2: Convert to fraction form
    65,484.94/90,345.54 = 42,836.86/x
  3. Step 3: Cross multiply
    65,484.94x = 90,345.54 × 42,836.86
  4. Step 4: Simplify right side
    65,484.94x = 3,870,119,248.60
  5. Step 5: Solve for x
    x = 3,870,119,248.60/65,484.94
  6. Step 6: Final answer
    x = 59,099.38

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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.