Home / 287,712,864.90-431,285,862.15-142,168,889.70

Finding the Fourth Proportional to 287,712,864.90, 431,285,862.15 and 142,168,889.70

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Solution

The fourth proportional to 287,712,864.90, 431,285,862.15 and 142,168,889.70 is: 213,113,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,864.90 : 431,285,862.15 = 142,168,889.70 : x
  2. Step 2: Convert to fraction form
    287,712,864.90/431,285,862.15 = 142,168,889.70/x
  3. Step 3: Cross multiply
    287,712,864.90x = 431,285,862.15 × 142,168,889.70
  4. Step 4: Simplify right side
    287,712,864.90x = 61,315,432,165,172,744
  5. Step 5: Solve for x
    x = 61,315,432,165,172,744/287,712,864.90
  6. Step 6: Final answer
    x = 213,113,279.40

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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.