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Finding the Fourth Proportional to 30,457,269.80, 45,685,904.70 and 21,387,343.40

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Solution

The fourth proportional to 30,457,269.80, 45,685,904.70 and 21,387,343.40 is: 32,081,015.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,457,269.80 : 45,685,904.70 = 21,387,343.40 : x
  2. Step 2: Convert to fraction form
    30,457,269.80/45,685,904.70 = 21,387,343.40/x
  3. Step 3: Cross multiply
    30,457,269.80x = 45,685,904.70 × 21,387,343.40
  4. Step 4: Simplify right side
    30,457,269.80x = 977,100,132,358,574
  5. Step 5: Solve for x
    x = 977,100,132,358,574/30,457,269.80
  6. Step 6: Final answer
    x = 32,081,015.10

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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.