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Finding the Fourth Proportional to 144,915.65, 199,987.53 and 81,252.08

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Solution

The fourth proportional to 144,915.65, 199,987.53 and 81,252.08 is: 112,130.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,915.65 : 199,987.53 = 81,252.08 : x
  2. Step 2: Convert to fraction form
    144,915.65/199,987.53 = 81,252.08/x
  3. Step 3: Cross multiply
    144,915.65x = 199,987.53 × 81,252.08
  4. Step 4: Simplify right side
    144,915.65x = 16,249,402,688.93
  5. Step 5: Solve for x
    x = 16,249,402,688.93/144,915.65
  6. Step 6: Final answer
    x = 112,130.08

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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.