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Finding the Fourth Proportional to 103,652.80, 143,056.32 and 63,390.40

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Solution

The fourth proportional to 103,652.80, 143,056.32 and 63,390.40 is: 87,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,652.80 : 143,056.32 = 63,390.40 : x
  2. Step 2: Convert to fraction form
    103,652.80/143,056.32 = 63,390.40/x
  3. Step 3: Cross multiply
    103,652.80x = 143,056.32 × 63,390.40
  4. Step 4: Simplify right side
    103,652.80x = 9,068,397,347.33
  5. Step 5: Solve for x
    x = 9,068,397,347.33/103,652.80
  6. Step 6: Final answer
    x = 87,488.20

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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.