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Finding the Fourth Proportional to 145,833.40, 218,798.70 and 71,000.20

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Solution

The fourth proportional to 145,833.40, 218,798.70 and 71,000.20 is: 106,523.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,833.40 : 218,798.70 = 71,000.20 : x
  2. Step 2: Convert to fraction form
    145,833.40/218,798.70 = 71,000.20/x
  3. Step 3: Cross multiply
    145,833.40x = 218,798.70 × 71,000.20
  4. Step 4: Simplify right side
    145,833.40x = 15,534,751,459.74
  5. Step 5: Solve for x
    x = 15,534,751,459.74/145,833.40
  6. Step 6: Final answer
    x = 106,523.96

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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.