Home / 287,712,866.40-431,285,864.40-142,168,891.20

Finding the Fourth Proportional to 287,712,866.40, 431,285,864.40 and 142,168,891.20

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Solution

The fourth proportional to 287,712,866.40, 431,285,864.40 and 142,168,891.20 is: 213,113,281.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,866.40 : 431,285,864.40 = 142,168,891.20 : x
  2. Step 2: Convert to fraction form
    287,712,866.40/431,285,864.40 = 142,168,891.20/x
  3. Step 3: Cross multiply
    287,712,866.40x = 431,285,864.40 × 142,168,891.20
  4. Step 4: Simplify right side
    287,712,866.40x = 61,315,433,131,981,544
  5. Step 5: Solve for x
    x = 61,315,433,131,981,544/287,712,866.40
  6. Step 6: Final answer
    x = 213,113,281.65

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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.