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Finding the Fourth Proportional to 65,113.60, 89,702.40 and 53,708.80

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Solution

The fourth proportional to 65,113.60, 89,702.40 and 53,708.80 is: 73,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,113.60 : 89,702.40 = 53,708.80 : x
  2. Step 2: Convert to fraction form
    65,113.60/89,702.40 = 53,708.80/x
  3. Step 3: Cross multiply
    65,113.60x = 89,702.40 × 53,708.80
  4. Step 4: Simplify right side
    65,113.60x = 4,817,808,261.12
  5. Step 5: Solve for x
    x = 4,817,808,261.12/65,113.60
  6. Step 6: Final answer
    x = 73,990.81

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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.