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Finding the Fourth Proportional to 77,907.60, 116,688.60 and 60,320.40

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Solution

The fourth proportional to 77,907.60, 116,688.60 and 60,320.40 is: 90,346.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,907.60 : 116,688.60 = 60,320.40 : x
  2. Step 2: Convert to fraction form
    77,907.60/116,688.60 = 60,320.40/x
  3. Step 3: Cross multiply
    77,907.60x = 116,688.60 × 60,320.40
  4. Step 4: Simplify right side
    77,907.60x = 7,038,703,027.44
  5. Step 5: Solve for x
    x = 7,038,703,027.44/77,907.60
  6. Step 6: Final answer
    x = 90,346.81

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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.