Home / 57,020,781.40-78,689,263.08-30,915,349.72

Finding the Fourth Proportional to 57,020,781.40, 78,689,263.08 and 30,915,349.72

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Solution

The fourth proportional to 57,020,781.40, 78,689,263.08 and 30,915,349.72 is: 42,663,499.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,020,781.40 : 78,689,263.08 = 30,915,349.72 : x
  2. Step 2: Convert to fraction form
    57,020,781.40/78,689,263.08 = 30,915,349.72/x
  3. Step 3: Cross multiply
    57,020,781.40x = 78,689,263.08 × 30,915,349.72
  4. Step 4: Simplify right side
    57,020,781.40x = 2,432,706,087,246,493.50
  5. Step 5: Solve for x
    x = 2,432,706,087,246,493.50/57,020,781.40
  6. Step 6: Final answer
    x = 42,663,499.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.