Home / 256,937,848.41-385,421,631.23-72,689,890.40

Finding the Fourth Proportional to 256,937,848.41, 385,421,631.23 and 72,689,890.40

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Solution

The fourth proportional to 256,937,848.41, 385,421,631.23 and 72,689,890.40 is: 109,039,039.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,937,848.41 : 385,421,631.23 = 72,689,890.40 : x
  2. Step 2: Convert to fraction form
    256,937,848.41/385,421,631.23 = 72,689,890.40/x
  3. Step 3: Cross multiply
    256,937,848.41x = 385,421,631.23 × 72,689,890.40
  4. Step 4: Simplify right side
    256,937,848.41x = 28,016,256,129,607,360
  5. Step 5: Solve for x
    x = 28,016,256,129,607,360/256,937,848.41
  6. Step 6: Final answer
    x = 109,039,039.22

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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.