Home / 287,623.10-431,430.60-129,851.30

Finding the Fourth Proportional to 287,623.10, 431,430.60 and 129,851.30

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Solution

The fourth proportional to 287,623.10, 431,430.60 and 129,851.30 is: 194,775.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,623.10 : 431,430.60 = 129,851.30 : x
  2. Step 2: Convert to fraction form
    287,623.10/431,430.60 = 129,851.30/x
  3. Step 3: Cross multiply
    287,623.10x = 431,430.60 × 129,851.30
  4. Step 4: Simplify right side
    287,623.10x = 56,021,824,269.78
  5. Step 5: Solve for x
    x = 56,021,824,269.78/287,623.10
  6. Step 6: Final answer
    x = 194,775.12

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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.