Home / 139,931.77-209,918.40-45,130.78

Finding the Fourth Proportional to 139,931.77, 209,918.40 and 45,130.78

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Solution

The fourth proportional to 139,931.77, 209,918.40 and 45,130.78 is: 67,702.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,931.77 : 209,918.40 = 45,130.78 : x
  2. Step 2: Convert to fraction form
    139,931.77/209,918.40 = 45,130.78/x
  3. Step 3: Cross multiply
    139,931.77x = 209,918.40 × 45,130.78
  4. Step 4: Simplify right side
    139,931.77x = 9,473,781,128.35
  5. Step 5: Solve for x
    x = 9,473,781,128.35/139,931.77
  6. Step 6: Final answer
    x = 67,702.86

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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.