Home / 102,001.20-153,001.80-78,673.20

Finding the Fourth Proportional to 102,001.20, 153,001.80 and 78,673.20

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Solution

The fourth proportional to 102,001.20, 153,001.80 and 78,673.20 is: 118,009.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,001.20 : 153,001.80 = 78,673.20 : x
  2. Step 2: Convert to fraction form
    102,001.20/153,001.80 = 78,673.20/x
  3. Step 3: Cross multiply
    102,001.20x = 153,001.80 × 78,673.20
  4. Step 4: Simplify right side
    102,001.20x = 12,037,141,211.76
  5. Step 5: Solve for x
    x = 12,037,141,211.76/102,001.20
  6. Step 6: Final answer
    x = 118,009.80

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1.5x scale

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.