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Finding the Fourth Proportional to 280,117.65, 420,121.80 and 93,129.15

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Solution

The fourth proportional to 280,117.65, 420,121.80 and 93,129.15 is: 139,675.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,117.65 : 420,121.80 = 93,129.15 : x
  2. Step 2: Convert to fraction form
    280,117.65/420,121.80 = 93,129.15/x
  3. Step 3: Cross multiply
    280,117.65x = 420,121.80 × 93,129.15
  4. Step 4: Simplify right side
    280,117.65x = 39,125,586,130.47
  5. Step 5: Solve for x
    x = 39,125,586,130.47/280,117.65
  6. Step 6: Final answer
    x = 139,675.55

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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.