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Finding the Fourth Proportional to 144,490.95, 199,428.66 and 87,920.55

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Solution

The fourth proportional to 144,490.95, 199,428.66 and 87,920.55 is: 121,349.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,490.95 : 199,428.66 = 87,920.55 : x
  2. Step 2: Convert to fraction form
    144,490.95/199,428.66 = 87,920.55/x
  3. Step 3: Cross multiply
    144,490.95x = 199,428.66 × 87,920.55
  4. Step 4: Simplify right side
    144,490.95x = 17,533,877,472.96
  5. Step 5: Solve for x
    x = 17,533,877,472.96/144,490.95
  6. Step 6: Final answer
    x = 121,349.31

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1.5x scale

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.