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Finding the Fourth Proportional to 71,365.60, 106,918.80 and 58,146.40

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Solution

The fourth proportional to 71,365.60, 106,918.80 and 58,146.40 is: 87,114.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,365.60 : 106,918.80 = 58,146.40 : x
  2. Step 2: Convert to fraction form
    71,365.60/106,918.80 = 58,146.40/x
  3. Step 3: Cross multiply
    71,365.60x = 106,918.80 × 58,146.40
  4. Step 4: Simplify right side
    71,365.60x = 6,216,943,312.32
  5. Step 5: Solve for x
    x = 6,216,943,312.32/71,365.60
  6. Step 6: Final answer
    x = 87,114.01

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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.