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Finding the Fourth Proportional to 144,038.60, 216,057.90 and 99,715.40

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Solution

The fourth proportional to 144,038.60, 216,057.90 and 99,715.40 is: 149,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,038.60 : 216,057.90 = 99,715.40 : x
  2. Step 2: Convert to fraction form
    144,038.60/216,057.90 = 99,715.40/x
  3. Step 3: Cross multiply
    144,038.60x = 216,057.90 × 99,715.40
  4. Step 4: Simplify right side
    144,038.60x = 21,544,299,921.66
  5. Step 5: Solve for x
    x = 21,544,299,921.66/144,038.60
  6. Step 6: Final answer
    x = 149,573.10

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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.