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Finding the Fourth Proportional to 65,340.81, 90,127.35 and 51,890.76

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Solution

The fourth proportional to 65,340.81, 90,127.35 and 51,890.76 is: 71,575.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,340.81 : 90,127.35 = 51,890.76 : x
  2. Step 2: Convert to fraction form
    65,340.81/90,127.35 = 51,890.76/x
  3. Step 3: Cross multiply
    65,340.81x = 90,127.35 × 51,890.76
  4. Step 4: Simplify right side
    65,340.81x = 4,676,776,688.29
  5. Step 5: Solve for x
    x = 4,676,776,688.29/65,340.81
  6. Step 6: Final answer
    x = 71,575.13

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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.