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Finding the Fourth Proportional to 66,462.80, 99,591.80 and 57,656.40

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Solution

The fourth proportional to 66,462.80, 99,591.80 and 57,656.40 is: 86,395.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,462.80 : 99,591.80 = 57,656.40 : x
  2. Step 2: Convert to fraction form
    66,462.80/99,591.80 = 57,656.40/x
  3. Step 3: Cross multiply
    66,462.80x = 99,591.80 × 57,656.40
  4. Step 4: Simplify right side
    66,462.80x = 5,742,104,657.52
  5. Step 5: Solve for x
    x = 5,742,104,657.52/66,462.80
  6. Step 6: Final answer
    x = 86,395.77

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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.