Home / 278,387.04-417,528.08-78,705.84

Finding the Fourth Proportional to 278,387.04, 417,528.08 and 78,705.84

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Solution

The fourth proportional to 278,387.04, 417,528.08 and 78,705.84 is: 118,043.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,387.04 : 417,528.08 = 78,705.84 : x
  2. Step 2: Convert to fraction form
    278,387.04/417,528.08 = 78,705.84/x
  3. Step 3: Cross multiply
    278,387.04x = 417,528.08 × 78,705.84
  4. Step 4: Simplify right side
    278,387.04x = 32,861,898,259.99
  5. Step 5: Solve for x
    x = 32,861,898,259.99/278,387.04
  6. Step 6: Final answer
    x = 118,043.92

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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.