Home / 208,708,668.76-287,953,374-120,570,507.40

Finding the Fourth Proportional to 208,708,668.76, 287,953,374 and 120,570,507.40

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Solution

The fourth proportional to 208,708,668.76, 287,953,374 and 120,570,507.40 is: 166,349,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,708,668.76 : 287,953,374 = 120,570,507.40 : x
  2. Step 2: Convert to fraction form
    208,708,668.76/287,953,374 = 120,570,507.40/x
  3. Step 3: Cross multiply
    208,708,668.76x = 287,953,374 × 120,570,507.40
  4. Step 4: Simplify right side
    208,708,668.76x = 34,718,684,410,721,968
  5. Step 5: Solve for x
    x = 34,718,684,410,721,968/208,708,668.76
  6. Step 6: Final answer
    x = 166,349,987.36

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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.