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Finding the Fourth Proportional to 138,866.64, 191,492.64 and 118,789.98

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Solution

The fourth proportional to 138,866.64, 191,492.64 and 118,789.98 is: 163,807.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,866.64 : 191,492.64 = 118,789.98 : x
  2. Step 2: Convert to fraction form
    138,866.64/191,492.64 = 118,789.98/x
  3. Step 3: Cross multiply
    138,866.64x = 191,492.64 × 118,789.98
  4. Step 4: Simplify right side
    138,866.64x = 22,747,406,875.75
  5. Step 5: Solve for x
    x = 22,747,406,875.75/138,866.64
  6. Step 6: Final answer
    x = 163,807.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.