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Finding the Fourth Proportional to 144,005.10, 216,007.70 and 128,841.90

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Solution

The fourth proportional to 144,005.10, 216,007.70 and 128,841.90 is: 193,262.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,005.10 : 216,007.70 = 128,841.90 : x
  2. Step 2: Convert to fraction form
    144,005.10/216,007.70 = 128,841.90/x
  3. Step 3: Cross multiply
    144,005.10x = 216,007.70 × 128,841.90
  4. Step 4: Simplify right side
    144,005.10x = 27,830,842,482.63
  5. Step 5: Solve for x
    x = 27,830,842,482.63/144,005.10
  6. Step 6: Final answer
    x = 193,262.89

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1.5x scale

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.