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Finding the Fourth Proportional to 65,305.95, 90,053.78 and 48,345.76

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Solution

The fourth proportional to 65,305.95, 90,053.78 and 48,345.76 is: 66,666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,305.95 : 90,053.78 = 48,345.76 : x
  2. Step 2: Convert to fraction form
    65,305.95/90,053.78 = 48,345.76/x
  3. Step 3: Cross multiply
    65,305.95x = 90,053.78 × 48,345.76
  4. Step 4: Simplify right side
    65,305.95x = 4,353,718,305.81
  5. Step 5: Solve for x
    x = 4,353,718,305.81/65,305.95
  6. Step 6: Final answer
    x = 66,666.49

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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.