Home / 280,536,263.10-387,106,509.51-155,071,509.66

Finding the Fourth Proportional to 280,536,263.10, 387,106,509.51 and 155,071,509.66

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Solution

The fourth proportional to 280,536,263.10, 387,106,509.51 and 155,071,509.66 is: 213,980,147.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,536,263.10 : 387,106,509.51 = 155,071,509.66 : x
  2. Step 2: Convert to fraction form
    280,536,263.10/387,106,509.51 = 155,071,509.66/x
  3. Step 3: Cross multiply
    280,536,263.10x = 387,106,509.51 × 155,071,509.66
  4. Step 4: Simplify right side
    280,536,263.10x = 60,029,190,828,928,848
  5. Step 5: Solve for x
    x = 60,029,190,828,928,848/280,536,263.10
  6. Step 6: Final answer
    x = 213,980,147.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.