Home / 72,971,530.40-100,700,721.88-39,931,787.32

Finding the Fourth Proportional to 72,971,530.40, 100,700,721.88 and 39,931,787.32

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Solution

The fourth proportional to 72,971,530.40, 100,700,721.88 and 39,931,787.32 is: 55,105,871.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,971,530.40 : 100,700,721.88 = 39,931,787.32 : x
  2. Step 2: Convert to fraction form
    72,971,530.40/100,700,721.88 = 39,931,787.32/x
  3. Step 3: Cross multiply
    72,971,530.40x = 100,700,721.88 × 39,931,787.32
  4. Step 4: Simplify right side
    72,971,530.40x = 4,021,159,809,082,630.50
  5. Step 5: Solve for x
    x = 4,021,159,809,082,630.50/72,971,530.40
  6. Step 6: Final answer
    x = 55,105,871.93

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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.