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Finding the Fourth Proportional to 86,934,007.20, 130,401,010.80 and 80,364,842.40

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Solution

The fourth proportional to 86,934,007.20, 130,401,010.80 and 80,364,842.40 is: 120,547,263.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,934,007.20 : 130,401,010.80 = 80,364,842.40 : x
  2. Step 2: Convert to fraction form
    86,934,007.20/130,401,010.80 = 80,364,842.40/x
  3. Step 3: Cross multiply
    86,934,007.20x = 130,401,010.80 × 80,364,842.40
  4. Step 4: Simplify right side
    86,934,007.20x = 10,479,656,681,742,698
  5. Step 5: Solve for x
    x = 10,479,656,681,742,698/86,934,007.20
  6. Step 6: Final answer
    x = 120,547,263.60

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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.