Home / 287,712,005.10-431,568,007.65-126,153,941.10

Finding the Fourth Proportional to 287,712,005.10, 431,568,007.65 and 126,153,941.10

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Solution

The fourth proportional to 287,712,005.10, 431,568,007.65 and 126,153,941.10 is: 189,230,911.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,005.10 : 431,568,007.65 = 126,153,941.10 : x
  2. Step 2: Convert to fraction form
    287,712,005.10/431,568,007.65 = 126,153,941.10/x
  3. Step 3: Cross multiply
    287,712,005.10x = 431,568,007.65 × 126,153,941.10
  4. Step 4: Simplify right side
    287,712,005.10x = 54,444,005,017,722,440
  5. Step 5: Solve for x
    x = 54,444,005,017,722,440/287,712,005.10
  6. Step 6: Final answer
    x = 189,230,911.65

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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.