Home / 155,807,718-215,020,981.80-86,191,898.64

Finding the Fourth Proportional to 155,807,718, 215,020,981.80 and 86,191,898.64

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Solution

The fourth proportional to 155,807,718, 215,020,981.80 and 86,191,898.64 is: 118,948,322.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,807,718 : 215,020,981.80 = 86,191,898.64 : x
  2. Step 2: Convert to fraction form
    155,807,718/215,020,981.80 = 86,191,898.64/x
  3. Step 3: Cross multiply
    155,807,718x = 215,020,981.80 × 86,191,898.64
  4. Step 4: Simplify right side
    155,807,718x = 18,533,066,668,778,884
  5. Step 5: Solve for x
    x = 18,533,066,668,778,884/155,807,718
  6. Step 6: Final answer
    x = 118,948,322.37

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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.