Home / 78,780.16-118,140.80-32,017.28

Finding the Fourth Proportional to 78,780.16, 118,140.80 and 32,017.28

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Solution

The fourth proportional to 78,780.16, 118,140.80 and 32,017.28 is: 48,013.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.16 : 118,140.80 = 32,017.28 : x
  2. Step 2: Convert to fraction form
    78,780.16/118,140.80 = 32,017.28/x
  3. Step 3: Cross multiply
    78,780.16x = 118,140.80 × 32,017.28
  4. Step 4: Simplify right side
    78,780.16x = 3,782,547,073.02
  5. Step 5: Solve for x
    x = 3,782,547,073.02/78,780.16
  6. Step 6: Final answer
    x = 48,013.96

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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.