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Finding the Fourth Proportional to 143,880.60, 215,883.08 and 77,242.88

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Solution

The fourth proportional to 143,880.60, 215,883.08 and 77,242.88 is: 115,897.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,880.60 : 215,883.08 = 77,242.88 : x
  2. Step 2: Convert to fraction form
    143,880.60/215,883.08 = 77,242.88/x
  3. Step 3: Cross multiply
    143,880.60x = 215,883.08 × 77,242.88
  4. Step 4: Simplify right side
    143,880.60x = 16,675,430,842.47
  5. Step 5: Solve for x
    x = 16,675,430,842.47/143,880.60
  6. Step 6: Final answer
    x = 115,897.70

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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.