Home / 120,528,007.20-180,792,010.80-72,155,066.40

Finding the Fourth Proportional to 120,528,007.20, 180,792,010.80 and 72,155,066.40

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Solution

The fourth proportional to 120,528,007.20, 180,792,010.80 and 72,155,066.40 is: 108,232,599.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,528,007.20 : 180,792,010.80 = 72,155,066.40 : x
  2. Step 2: Convert to fraction form
    120,528,007.20/180,792,010.80 = 72,155,066.40/x
  3. Step 3: Cross multiply
    120,528,007.20x = 180,792,010.80 × 72,155,066.40
  4. Step 4: Simplify right side
    120,528,007.20x = 13,045,059,543,863,520
  5. Step 5: Solve for x
    x = 13,045,059,543,863,520/120,528,007.20
  6. Step 6: Final answer
    x = 108,232,599.60

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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.