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Finding the Fourth Proportional to 144,547.80, 216,918.90 and 65,621.40

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Solution

The fourth proportional to 144,547.80, 216,918.90 and 65,621.40 is: 98,476.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,547.80 : 216,918.90 = 65,621.40 : x
  2. Step 2: Convert to fraction form
    144,547.80/216,918.90 = 65,621.40/x
  3. Step 3: Cross multiply
    144,547.80x = 216,918.90 × 65,621.40
  4. Step 4: Simplify right side
    144,547.80x = 14,234,521,904.46
  5. Step 5: Solve for x
    x = 14,234,521,904.46/144,547.80
  6. Step 6: Final answer
    x = 98,476.23

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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.