Home / 139,968,691.20-209,953,036.80-85,549,132.80

Finding the Fourth Proportional to 139,968,691.20, 209,953,036.80 and 85,549,132.80

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Solution

The fourth proportional to 139,968,691.20, 209,953,036.80 and 85,549,132.80 is: 128,323,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,691.20 : 209,953,036.80 = 85,549,132.80 : x
  2. Step 2: Convert to fraction form
    139,968,691.20/209,953,036.80 = 85,549,132.80/x
  3. Step 3: Cross multiply
    139,968,691.20x = 209,953,036.80 × 85,549,132.80
  4. Step 4: Simplify right side
    139,968,691.20x = 17,961,300,226,966,488
  5. Step 5: Solve for x
    x = 17,961,300,226,966,488/139,968,691.20
  6. Step 6: Final answer
    x = 128,323,699.20

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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.