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Finding the Fourth Proportional to 139,566.88, 209,373.78 and 64,656.40

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Solution

The fourth proportional to 139,566.88, 209,373.78 and 64,656.40 is: 96,995.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,566.88 : 209,373.78 = 64,656.40 : x
  2. Step 2: Convert to fraction form
    139,566.88/209,373.78 = 64,656.40/x
  3. Step 3: Cross multiply
    139,566.88x = 209,373.78 × 64,656.40
  4. Step 4: Simplify right side
    139,566.88x = 13,537,354,869.19
  5. Step 5: Solve for x
    x = 13,537,354,869.19/139,566.88
  6. Step 6: Final answer
    x = 96,995.47

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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.