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Finding the Fourth Proportional to 143,430.60, 215,145.90 and 64,698.60

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Solution

The fourth proportional to 143,430.60, 215,145.90 and 64,698.60 is: 97,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,430.60 : 215,145.90 = 64,698.60 : x
  2. Step 2: Convert to fraction form
    143,430.60/215,145.90 = 64,698.60/x
  3. Step 3: Cross multiply
    143,430.60x = 215,145.90 × 64,698.60
  4. Step 4: Simplify right side
    143,430.60x = 13,919,638,525.74
  5. Step 5: Solve for x
    x = 13,919,638,525.74/143,430.60
  6. Step 6: Final answer
    x = 97,047.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.